Answer:
1/6
Explanation:
Assuming the disorder is not sex linked, Charles is a carrier so he will be Ff.
His wife Elaine can be a carrier or not because her parents must have been both Ff
Possible F1 generation for her was FF, Ff, Ff and ff. She does not have the disease.
Therefore the total chance of her having FF was 1/3 whereas Ff will be 2/3
Probability of the kid having the disease will be calculated by;
(2/3×1/4) +(1/3×0)= 1/6
The probability that Charles and Elaine will have a baby with cystic fibrosis is 25%.
Explanation:The probability that Charles and Elaine will have a baby with cystic fibrosis can be determined by analyzing their family history and considering the genetic inheritance of the disease. In this case, Charles and his first wife had a child with cystic fibrosis, indicating that Charles is a carrier of the gene. Elaine's brother also had cystic fibrosis, suggesting that there is a high probability that Elaine is also a carrier.
Since cystic fibrosis is an autosomal recessive disease, both parents must be carriers of the faulty gene in order for their child to have the disease. Therefore, the probability of Charles and Elaine having a baby with cystic fibrosis would be 25%.
Scientists developed the ________ model after their studies of the fossil record revealed that some species appear quite suddenly and then remain essentially unchanged phenotypically for a long period of time.
Answer:
Punctuated Equilibrium
Explanation:
The phyletic gradualism model and the punctuated equilibrium are aspects models of macroevolution that are characterised with varying patterns.
However, the punctuated equilibrium model of evolutionary history consists of geologically long periods of inactivity (stasis) with little or no evolution, interrupted or "punctuated" by geologically short periods of rapid evolution.
Weber’s law is most closely associated with ____. a.the just noticeable differenceb.the absolute thresholdc.sensory reductiond.sensory deprivation
Answer: Option A: The just noticeable difference
Explanation:
Weber law is most mostly referred to as the "just noticeable difference" law which supports the idea that the difference threshold is a constant fraction of the original stimulus. It is mostly possible to notice a change in the music volume when trying to study in somwhere very quiet while it may be almost impossible to establish a difference in the music volume while out in a party.
If one compares the base sequences of related genes from different species, one is likely to find that corresponding ________ are usually conserved, but the sequences of ________ are much less well conserved. If one compares the base sequences of related genes from different species, one is likely to find that corresponding ________ are usually conserved, but the sequences of ________ are much less well conserved. A.introns; B.exons exons; C.introns chaperons; D. exons introns; E. proteins introns; F.chaperons
If one compares the base sequences of related genes from different species, one is likely to find that corresponding exons are usually conserved, but the sequences of introns are much less well conserved.
Explanation:
A gene consists of two parts called the exons and introns.
Exons code for the gene products while introns lie between two consecutive exons and do not code for any gene product.
Exons are highly conserved within a species while introns are less conserved and help in diversifying individuals within same species.
Introns are spliced of during the mRNA processing to give rise to a mature mRNA that will code for a protein.
Exons are usually conserved, while introns are much less well conserved when comparing the base sequences of related genes from different species.
When comparing the base sequences of related genes from different species, one is likely to find that corresponding exons are usually conserved, but the sequences of introns are much less well conserved.
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A scientist randomly divided a group of 100 lab rats into two groups of 50. One group was fed regular rat chow while the other was fed the same amount of rat chow with added DDT. Both groups were housed in the same room with the same environmental conditions. At the end of the experiment, rats were weighed and the mean difference calculated. Refer to the accompanying narrative. What variable or variables were manipulated by the scientist?
Answer:
Addition of DDT in food
Explanation:
The variable that was manipulated during the study was the food given to the two groups of rat.
All other factors such as the number of rats in each group, amount of food, room condition and environmental condition were same for both groups.
With addition of DDT in food (rat chow) of one of the group, scientist has manipulated the study process for one of the group.
This was done with the purpose of understanding the effect of DDT on the weights on the rats of one group by comparing it with the rats of another control group (constant factors)
The manipulated variable was the addition of DDT to the rat chow in one of the groups, creating a difference in diet.
In the described experiment, the scientist manipulated one variable: the composition of the diet given to the two groups of lab rats. Specifically, the scientist manipulated the presence or absence of DDT in the rat chow.
Independent Variable:
Presence or absence of DDT in the rat chow. This is the variable that the scientist deliberately changed or manipulated.
Dependent Variable:
Rat weight and the mean difference in weight between the two groups. This is the variable that the scientist measured as the outcome of the experiment.
The independent variable in this experiment is the DDT in the rat chow. One group received regular rat chow (without DDT), while the other group received the same rat chow but with added DDT.
The dependent variable is the rat weight and the mean difference in weight between the two groups.
After the rats were exposed to their respective diets, their weights were measured, and the mean difference in weight was calculated.
By manipulating the diet and measuring the weight differences, the scientist aimed to investigate the effect of DDT exposure on the weight of the lab rats.
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Page(s) 80-81 Understand text setting. In organum, the lower voice moves slowly, and its pitches are from a chant. The composer adds the upper voices. What best describes the text setting of the upper voices? The upper voices sing –.
Answer:
melismatically (lots of pitches per syllable of text)
Explanation:
Melismatic Music
A melisma is observed when a singular syllable of text is stretched over varing type of pitches. Take for instance, the song "Ding Dong Merrily on High;" observe the melisma on the first syllable of the word 'Gloria.' Observe how the syllable is stretched over 16 varying type of pitches.
The first attached image below shows the melisma on the first syllable of the word.
Some singers such as Beyoncé, Christina Aguilera, or the late Whitney Houston have unique vocal skills and this can be perceived to be through their use of melismas to beautify melodies -- mostly at the ends of their words. Take for example, late Whitney Houston cover of Dolly Parton's song ''I Will Always Love You'' is filled with melismas!
Fil in the blanks:1. A fat molecule is composed of two types of smaller molecules, including only one molecule of _________. 2. A _________ fat molecule also includes one, two, or three molecules. 3. A fat molecule with only one fatty acid is called a __________. 4. A fat molecule with three fatty acids is called a triacylglycerol, or a _________. 5. A fatty acid includes a carboxyl group (-COOH) at one end as well as a long _________. 6. The hydrocarbon chains found in fats store a lot of energy. They also make fats _________, or insoluble in water.
Answer:
1. Glycerol
2. Fatty acids
3. Monoglycerides
4. Triglycerides
5. Hydrocarbon
6. Hydrophobic
Explanation:
1. Glycerol
Fat consist of a molecule called glycerol that is attached to one, two, or three fatty acids. Glycerol is the basis of all fats and consists of a three-carbon chain that is attached to the fatty acids.
2. Fatty acids
Fats is made up of three fatty acids and a glycerol, it can also be called triacylglycerols or triglycerides.
3. Monoglyceride
It is a glycerol molecule with a singular fatty acid. It is formed through the combination of OH of glycerol to the OH of the fatty acid.
4. Triglycerides
It has three fatty acid molecules. It is a tri-esters made up of a glycerol attached to three fatty acid molecules.
5. Hydrocarbon
Fatty acids is made up of long, unbranched hydrocarbons with a carboxylic acid group found at one end.
6. Hydrophobic
The hydrophobic nature of fat arises from the carbon-hydrogen bonds that are nonpolar.
A fat molecule consists of glycerol and fatty acids. Monoglycerides have one fatty acid, while triglycerides have three. Fatty acids contain a carboxyl group and hydrocarbon chain, making fats hydrophobic.
1. A fat molecule is composed of two types of smaller molecules, including only one molecule of glycerol.
2. A monoglyceride fat molecule also includes one, two, or three molecules.
3. A fat molecule with only one fatty acid is called a monoglyceride.
4. A fat molecule with three fatty acids is called a triacylglycerol, or a triglyceride.
5. A fatty acid includes a carboxyl group (-COOH) at one end as well as a long hydrocarbon chain.
6. The hydrocarbon chains found in fats store a lot of energy. They also make fats hydrophobic, or insoluble in water.
Fats are vital molecules in biology, serving multiple functions. They are a concentrated source of energy due to the high energy content in the hydrocarbon chains of fatty acids.
Fats also play a role in insulation, cushioning of organs, and are essential components of cell membranes.
The hydrophobic nature of fats makes them ideal for creating protective barriers in cells and organisms, while their varied structures contribute to their versatility in different biological processes.
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Large-scale cancer studies have found that the p53 gene is often mutated in tumor cells. In fact, the gene encoding the p53 protein is mutated in tumor cells more often than any of the other 20,000 human genes. Based on this information, why was the Bunz study important?
Bunz's study provided a deeper understanding of the role of the p53 gene in the cell cycle, which can be used to enhance the understanding of cancers pathways and lead to new therapeutic treatments.
Tumor suppressor genes are genes that in normal conditions repair errors in DNA, indicate to the cell when they must die (it is known as programmed cell death or apoptosis), slow down cell division, etc.
The p53 gene is a tumor suppressor gene expressed in the nucleus of normal cells, where P53 protein acts as a transcription factor.
This gene (p53) is involved in many signaling pathways such as cell senescence, cell cycle arrest, DNA repair, etc.
The work by F. Bunz (1998) provides useful information on how P53 protein regulates the expression of target genes and thus avoids the proliferation of cancer cells.
In conclusion, Bunz's study provided a deeper understanding of the role of the p53 gene in the cell cycle, which can be used to enhance the understanding of cancers pathways and lead to new therapeutic treatments.
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The Bunz study is significant as it unravels the pivotal role of the p53 gene, its mutations, and their association with most types of cancer. Mutations in p53 disrupt its normal regulation of the cell cycle, triggering uncontrolled cell growth and permitting propagation of these abnormal cells, contributing to cancer.
Explanation:The Bunz study is critical in our understanding of cancer since it provides insights into the role of the p53 gene and its mutations which are prevalent in tumor cells. p53 is a tumor suppressor gene, with proteins that regulate the cell cycle, particularly at the G₁ checkpoint. When functioning correctly, p53 proteins monitor and repair DNA damage, or trigger cell death processes (apoptosis) in cases where repair is not feasible.
Mutations in the p53 gene could generate abnormal p53 proteins that fail to check and halt cell division once the cell's DNA is damaged, leading to uncontrolled cell growth and further accumulation of potential harmful mutations. These changes could lead to unchecked cell division, contributing to cancerous growth and the spreading of these abnormal cells (metastasis). Therefore, understanding the functioning of the p53 gene, its roles, and effects of its mutations is paramount to our grasp of cancer biology and avenues for its prevention and treatment.
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The following is an excerpt from the case study "It's All Greek to Me": "The hematologist meets with the Stamos family in the exam room. 'Mr. and Mrs. Stamos, there are some things that do not look normal in Nikoleta's blood. I am not sure of the cause, but I do know that Nikoleta's red blood cells aren't shaped correctly and they are not the right color. The red blood cells should be very red under the microscope and her red blood cells are light pink." . How did this observation lead to identifying the type of anemia exhibited by Nikoleta?
A. The shape of the red blood cells suggested that they were causing blood clots.
B. The shape of the red blood cells suggested that they were causing arterial plaques.
C. The pale color of the red blood cells suggested they had malfunctioning hemoglobin.
D. The pale color of the red blood cells suggested they had malfunctioning cell membranes.
Answer:
The pale color of the red blood cells suggested they had malfunctioning hemoglobin.
Explanation:
Red blood cells are the blood cells that have the protein hemoglobin. Hemoglobin is bright red in color when it is bound to oxygen. The heme of hemoglobin binds to oxygen and makes the RBCs to look red in color. Anemia is a condition when the count of red blood cells or the amount of hemoglobin is less in the blood.
When hemoglobin is not able to bind or release oxygen properly, the person experiences anemia. In the given observation, the red blood cells appear pink rather than red in color. This means that the hemoglobin is not working properly leading to deficiency of oxygen to the body cells and anemia.
Answer:
The pale color of the red blood cells suggested they had malfunctioning hemoglobin.
Explanation:
At high latitudes, in both the Northern and Southern Hemispheres, seasonal shifts in input of solar energy produce ________ with low average temperatures and shorter day lengths and _______ with high average temperatures and longer day lengths.
Answer:
Winter and Summer season
Explanation:
The season occurs on earth because of the tilt of the earth's rotational axis. There occurs variation in season from one place to another depending upon various factors, in both the northern and the southern hemispheres.
In the higher latitudinal areas, in both the hemispheres, there occurs winter and summer season. During the time of winter in the northern hemisphere, the earth comes closer to the sun, but because of the tilt of the earth's rotation axis, it can reflect the majority of the incoming solar radiation back into space. The winters are usually characterized by the occurrence of low average temperature and the duration of daylight is much shorter.
On the other hand, during the time of summer, the earth is at the furthest from the sun, but most of the solar radiation easily enters the earth's atmosphere. It is due to which the average temperature increases and the duration of daylight are longer.
At what age level do most people become aware of the changes in their bodies related to the aging process?
The question is incorrect as it does not have the option which are:
a) early adulthood
b) middle adulthood
c) late adulthood
d) central adulthood
Answer:
B) middle adulthood
Explanation:
Ageing refers to the accumulation of natural physical, social and psychological changes in human beings.
The signs of the ageing like the wrinkles, the gain of the weight, growth of grey hairs, loss of hearing, arthritis and other disorders start appearing in the middle age or the age between 40 to 65 years.
Since the physical changes take place during the 40 to 65 years which is considered the middle adulthood, therefore, B is the correct answer.
Thus, Option-B is the correct.
You are providing care to an adult who is unresponsive and not breathing as a
result of a drowning. You give your first ventilation before performing CPR and
notice that the chest does not rise. Which of the following should you do next?
a. Change the position of the mask and then look for chest movement.
b. Blow into the mask more forcefully and then look for the chest to rise.
c. Re-tilt the victim’s head and then attempt another ventilation.
d. Give 5 back blows and then check the victim’s mouth.
Answer:
d give him blow
Explanation:
Final answer:
Re-tilt the victim’s head and attempt another ventilation. This could ensure a clear airway for effective breath delivery. If no chest rise occurs after re-tilting, check the mouth for obstructions before trying again.
Explanation:
An improper head position can block the airway, making ventilations ineffective. Re-tilting the head can help to open the airway. If chest rise is still not achieved after repositioning the head, then look for and remove any visible obstruction from the mouth and reattempt ventilation.
It is important to remember that when a person is drowning, getting them out of the water and to stable ground is critical before beginning CPR. For an unconscious person who was drowning, every second without oxygen is important for their survival and recovery. Moreover, while compression-only CPR is recommended for bystanders who are not trained in mouth-to-mouth ventilation, trained first responders will perform both chest compressions and mouth-to-mouth breathing to provide effective CPR.
You are viewing a pedigree and trying to determine the inheritance pattern of a trait. List three characteristics that, if observed, would indicate that the trait is X-linked recessive?
Answer:
X linked inheritance is one of the mechanisms of the inheritance which is associated with the mutation of the gene present on the X chromosome.
The characteristics of the X linked recessive inheritance that must be observed in the pedigree analysis will be-
1. X linked trait is always passed from the mother to the sons (females to males)
2. The males (XY) are usually affected by the gene as only one copy of the recessive gene in males can show its effect.
3. Females are the carrier of the disease but they are not affected by the condition.
In a certain variety of chicken, some offspring have a feather pattern that is black-and-white checkered. Chickens with this checkered feather pattern result from the cross of a black chicken with a white chicken.Which of the following types of inheritance is most likely responsible for the checkered feather pattern?
codominant
dominant
polygenic
sex-linked
Final answer:
The checkered feather pattern in chickens resulting from a cross between a black chicken and a white chicken indicates codominant inheritance, where both alleles are equally expressed.
Explanation:
The checkered feather pattern seen in some offspring resulting from a cross between a black chicken and a white chicken is most likely a result of codominant inheritance. This type of inheritance pattern occurs when two different alleles for a gene are expressed equally, leading to a phenotype that displays characteristics of both alleles. In the case of the chickens, neither the black nor white feather color is fully dominant over the other; instead, both colors are expressed, resulting in the checkered pattern.
The Dunkers are a religious group that moved from Germany to Pennsylvania in the mid-1700s. They do not marry with members outside their own immediate community. Today, the Dunkers are genetically unique and differ in gene frequencies, at many loci, from all other populations including those in their original homeland. Which of the following likely explains the genetic uniqueness of this population?
A) population bottleneck and Hardy-Weinberg equilibrium
B) heterozygote advantage and stabilizing selection
C) sexual selection and inbreeding depression
D) mutation and natural selection
E) founder effect and genetic drift
Answer:
E) founder effect and genetic drift
Explanation:
Dunkers moved to Pennsylvania and inhabited a new area to develop a new population. This new population might not have the same gene pool and the same allele frequencies for all the genes as present in the original population. The change in the allele frequencies of a population due to the colonization of a new area by a few members is called the founder effect.
The small size of the new population of Dunkers present in Pennsylvania was more likely to be affected by any chance event which could have added more uniqueness to their gene pool. This is called genetic drift. Therefore, the genetic uniqueness of their population from all the other populations and from their original population might be the result of founder effect and genetic drift.
The genetic uniqueness of the Dunkers likely resulted from the founder effect, where a small number of individuals established a new population with limited genetic variation, and genetic drift, which caused random changes in allele frequencies over time.
Explanation:The genetic uniqueness of the Dunkers can likely be explained by E) the founder effect and genetic drift. The founder effect refers to the loss of genetic variation that occurs when a new population is established by a very small number of individuals from a larger population. In the case of the Dunkers, the original settlers who moved from Germany to Pennsylvania would have carried a subset of the larger German population's genetic diversity.
Over time, genetic drift, or random changes in allele frequencies, would have further altered the Dunkers' gene pool, contributing to their genetic uniqueness. Because the Dunkers do not marry outside their own immediate community, this would have limited the introduction of new genetic variations into their gene pool, enhancing the effects of genetic drift and the founder effect.
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______ stimulates the contraction of mammary glands when nursing infant. Group of answer choices Prolactin Oxytocin Follicular-stimulating hormone Growth hormone Luteinizing hormone
Answer:
Oxytocin
Explanation:
Oxytocin is a hormone produce in the hypothalamus region of the brain, help secreted by the pituitary gland and has a wide variety of function within the human body; both male and female.
The hormone has been found to be responsible for womb contraction during labor in pregnant women and also promote lactation by moving milk into the breast after giving birth. It also aids the release of breast-milk during the feeding of the baby.
In men, the hormone has been found to be important in the movement of sperm cells as well as the production of testosterone.
The correct answer is oxytocin.
Most causes of speciation are relatively slow, in that they may take many generations to see changes, with the exception of _____.
a) natural selection
b) reinforcement
c) colonization
d) polyploidy
Answer:
the answer is choice D, polyploidy
Explanation:
Polyploidy is an exception to slow speciation. It involves an organism having more than two sets of chromosomes, leading to immediate reproductive isolation. This frequently results in instantaneous creation of a new species, particularly in plants.
Explanation:In the context of speciation, the shift to a new species is usually a slow and progressive occurrence that might require several generations. However, there exists an exception which is 'd) polyploidy'. Polyploid organisms have more than two sets of chromosomes leading to immediate reproductive isolation. The offspring of such a case would be a polyploid and might not be able to interbreed with either parent, and thus a new species is instantly formed. Polyploidy is particularly common in plants and less so in animals.
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Calvin ate a candy bar, which caused his body's blood glucose levels to become unbalanced. His body responded by initiating a feedback mechanism to return his body to homeostasis. Place the steps of this feedback mechanism in order, starting with the blood glucose imbalance that occurred after Calvin consumed the candy bar.
A) Calvin's blood glucose
levels decreased.
B) Calvin's pancreas stopped
secreting insulin.
C) Calvin's body cells started
to take up glucose and
store it as glycogen.
D) Calvin's blood glucose
levels increased.
E) Calvin's pancreas started
secreting insulin.
Answer:
d, e, c, a, b
Explanation:
Final answer:
After eating a candy bar, (option D) Calvin's blood glucose levels increased, leading to the secretion of insulin by the pancreas, which then caused glucose uptake by cells, glycogen storage, and eventually a decrease in blood glucose to achieve homeostasis.
Explanation:
When Calvin ate a candy bar, his body's blood glucose levels increased, initiating a negative feedback loop to return to homeostasis. Below are the steps in that feedback mechanism, in correct order:
D) Calvin's blood glucose levels increased.
E) Calvin's pancreas started secreting insulin.
C) Calvin's body cells started to take up glucose and store it as glycogen.
A) Calvin's blood glucose levels decreased.
B) Calvin's pancreas stopped secreting insulin.
The consumption of the candy bar raised Calvin's blood glucose, which signaled his pancreas to release insulin. The insulin facilitated the uptake of glucose by body cells and its storage as glycogen in the liver, lowering the glucose levels in the blood back to normal, until the pancreas reduced its insulin secretion.
In the essay, the point is made that the right questions must be asked when designing an experiment that measures how genetics and environment "shape who we are." Which of the following measurements is probably the least valuable in such an experiment?
Answer:
The correct answer is - the average lifespan.
Explanation:
As it is mentioned in the provided question that the experiment is design to measure how environment and the genetics shapes who we are which means effect of genetics and environment that is responsible for our present selves.
Generally such experiment include various variable that can affect the experiment on different level. The least useful information or measurement is the average life span of the population as it can vary and depends on several other factors than the genetics and environment directly.
Thus, the correct answer is - the average lifespan.
Identify the four postulates of natural selection.Select all that apply.1. Individuals in a population all possess the same traits.2. All individuals in a population have equal reproductive success.3. Some trait differences are heritable.4. Individuals with certain traits are more likely to survive and reproduce.5. Individuals in a population vary in the traits they possess.6. Survival and reproductive success are variable among individuals in a population.
The four postulates of natural selection are individuals in a population vary in the traits they possess, some trait differences are heritable, individuals with certain traits are more likely to survive and reproduce, and survival and reproductive success are variable among individuals in a population.
Explanation:The four postulates of natural selection are:
Individuals in a population vary in the traits they possess. This means that individuals in a population have different physical characteristics or traits.Some trait differences are heritable. This means that some of these traits can be passed on from parents to offspring.Individuals with certain traits are more likely to survive and reproduce. This means that individuals with advantageous traits have a better chance of surviving and reproducing compared to individuals with less advantageous traits.Survival and reproductive success are variable among individuals in a population. This means that not all individuals in a population are equally successful in terms of survival and reproduction.Learn more about Natural selection here:https://brainly.com/question/32227158
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The four postulates of natural selection are: Individuals in a population vary in traits, some trait differences are heritable, certain traits increase likelihood of survival and reproduction, and survival and reproductive success vary among individuals.
Explanation:The four postulates of natural selection are:
Individuals in a population vary in the traits they possess. Not all organisms are genetically identical and there are variations in their traits. Some trait differences are heritable. This means the differences in traits can be passed from parents to their offspring. Individuals with certain traits are more likely to survive and reproduce. The inherited trait variations differentially affect the ability to survive and reproduce under specific environmental conditions. Survival and reproductive success are variable among individuals in a population. This relates to the concept of 'survival of the fittest' where organisms with advantageous traits have a better chance of survival and reproduction. Learn more about Postulates of Natural Selection here:
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What were some of the misconceptions people had about the cause of the flu epidemic of 1918?
The 1918 flu pandemic was the severe pandemic in recent history. The common remedy for this flu is Aspirin, or acetylsalicyclic acid are used to reduce fever or pain.
Explanation:
The influenza flu is caused by an H1N1 virus with genes of origin. It is found that about 500 million people among one third of the world's population are affected by virus.
It is an oddity of history that the influenza epidemic of 1918 has been overlooked in the teaching. Documentation of the disease is selected from the holdings of the National Archives regional archives.
These documents helps in epidemic that takes right place as a major disaster. Air purifiers removes the smallest microbes in the air by reducing the harmful germs that includes cold, flu, dust and mold spores.
The term describing bacteria with flagella that are arranged as a tuft coming from one pole is __________.
Answer:
The correct answer is- Lophotrichous
Explanation:
There are four types of bacteria based on the presence and distribution of flagella on them. The bacteria which have only one flagellum at one pole that bacteria is called monotrichous.
The bacteria which have single flagella at both sides are called amphitrichous. Bacteria that have numerous flagella distributed evenly on their body surface are called Peritrichous.
The bacteria which have a tuft of flagella attached on one side or pole are called lophotrichous. Therefore the correct answer is lophotrichous.
What is a diagnostic test in which an X-ray is obtained after injection of radiopaque contrast material into blood vessels?
Answer:Digital subtraction angiography (DSA)
Explanation:
DSA is a fluroscopy technique which is used in intervenous radiology.
This is done in order to visualize the the blood vessels found in dense or bony soft tissue environment.
The image is produced with the help of contrast medium by subtracting the pre-contrast image from the subsequent image and hence named as digital subtraction angiography.
Male northern elephant seals (Mirounga angustirostris) compete with one another for territories along the beach. Males defend these territories throughout the breeding season. The males that win the male–male competitions defend the "best" territories, and have access to females that stay in that territory of the beach. The females land on the beach during mating season, choosing which territory of the beach to join. They then disproportionately breed with the male that defends that area of the beach. At what point may intersexual selection occur in these elephant seals?
A. when the female is swimming to the beach
B. when the female leaves the beach after mating with a male
C. when the male defends his group of females against a different male
D. when the female lands on the beach and chooses her resting location
E. when the male mates with a female within his group
Intersexual selection in northern elephant seals occurs when the female lands on the beach and selects her resting location, indirectly choosing the dominant male that controls that territory.
The point at which intersexual selection may occur in these northern elephant seals is when the female lands on the beach and chooses her resting location. This is because the females are the ones making the choice of which territory to join, thereby also choosing the male that occupies and defends that territory. Option D
Intersexual selection entails females selecting males based on certain preferred traits. In this scenario, the act of selection is not direct; however, by choosing a territory dictated by the dominant male, the female indirectly selects the male as well. This male has already proven his fitness through intrasexual selection, where he has defended his territory from other males, exhibiting desirable traits such as strength and the ability to control resources.
All fungi are
Group of answer choices
eukaryotes and heterotrophic.
eukaryotes and autotrophic.
prokaryotes and autotrophic.
prokaryotes and heterotrophic.
Answer:
eukaryotes and heterotrophic.
Explanation:
Eukaryotes are organisms whose cells nucleus are enclosed.
Heterotrophs are organism that cannot produce its own food, instead they absorb nutrients from plant and animal remains.
Final answer:
Fungi are eukaryotes and heterotrophic, meaning they have cells with a nucleus and obtain nutrients by consuming organic matter from outside themselves.
Explanation:
All fungi are:
Fungi, such as mushrooms and molds, are eukaryotes and heterotrophic. This means they have cells with a nucleus (eukaryotic) and obtain nutrients by consuming organic matter from outside themselves (heterotrophic). Unlike plants, fungi do not perform photosynthesis and rely on other organisms for food.
For example, yeast is a type of unicellular fungus that is commonly used in baking and brewing. It breaks down sugar into carbon dioxide gas and alcohol through its metabolism.
Does a bike traveling 35miles from within Springs to Alphapptta display velocity? Explain why or why
not.
Answer:
no
Explanation:
they could have been going 1 mile per hour or 10 miles per hour and we would have no idea. This just gives the distance traveled/position
DNA is approximately 2.5 nmnm in length. If an average man is 5 ft 10 in.in. tall, how many DNA molecules could be stacked to extend from the ground to the top of the head of an average man?
Answer:
7.112× 10⁸.
Explanation:
The length of DNA is 2.5 nm = 2.5 × 10⁻⁹m.
The average human length = 5 ft 10 in = 70 inch.
1 inch = 0.0254 m.
70 inch = 70 × 0.0254 = 1.778 m.
Number of DNA molecules = length of man / length of DNA.
Number of DNA molecules = 1.778 m / 2.5 × 10⁻⁹m.
Number of DNA molecules = 7.112× 10⁸.
Thus, the answer is 7.112× 10⁸.
During Meiosis, the alleles on each gene will separate individually into the gametes. This means that no matter what alleles were paired together in the parent, each gamete receives one allele. Mendel stated this to be the Law of **
A. Gene Assortment
B. Independent Assortment
C. Gene Regulation
D. Independent Segregation
Option B. The law proposed by Mendel that refers to the separation of alleles into gametes during Meiosis is the Law of Independent Assortment. This law suggests that different pairs of alleles are passed independently, which leads to unique combinations of traits and increased genetic diversity.
Explanation:The law that Mendel stated, referring to the process during Meiosis where the alleles on each gene separate individually into the gametes, is the Law of Independent Assortment. In this law, it is proposed that different pairs of alleles are passed to offspring independently of each other. This results in different traits being inherited, independently from each other, which enhances genetic variation. An example of this could be hair color and eye color, which are inherited independently of each other according to Mendel's law.
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The correct answer is D. Independent Segregation, which is Mendel's Law of Segregation. It states that alleles segregate during gamete formation, ensuring each gamete receives one allele per gene. This is different from the Law of Independent Assortment.
The question asks which of Mendel's laws states that the alleles on each gene will separate individually into the gametes, ensuring that each gamete receives one allele from each gene pair, no matter what alleles were paired together in the parent. This description matches Mendel's Law of Segregation, not the Law of Independent Assortment. Mendel's Law of Segregation articulates that every individual has two alleles for each gene and that these alleles segregate (or separate) during the formation of gametes, with each gamete receiving only one allele for each gene. This happens during the process of meiosis, a type of cell division that produces gametes (sperm and eggs) with half the number of chromosomes of the parent cell. In contrast, Mendel's Law of Independent Assortment deals with how alleles of two or more different genes get sorted into gametes independently of one another. Therefore, the correct answer is D. Independent Segregation.
Why are the premiums for a PPO health insurance plan generally more expensive than those for an HMO Health Insurance Plan?
Answer:
PPO offer higher flexibility in terms of choosing service provider even from outside its network list.
Explanation:
PPOs are more expensive than HMOs in case of terms of plan premiums. A PPO plan is flexible in terms of its service especially in case of choosing a care provider. Like HMO, PPO also give exposure to its networks of healthcare providers but give an added advantage in terms of arranging specialist care taker even if they are out of network. Therefore, PPO offers higher patient choices and also reimburse their expenditure for out of network service.
Answer:
A. PPO insurance plans offer a wider choice of primary care doctors and specialists.
By serving as a resource for investigators, a specimen collection increases
the reliability of scientific knowledge. Which of the following best explains
why this might be true?
A. A precious object is kept hidden in a secret place so that it is not
damaged.
B. Only one scientist is allowed to view the evidence and formulate a
conclusion.
O
C. Several scientists compete to create the most entertaining
demonstration
O
D. Different scientists can observe and analyze the same items.
By serving as a resource for investigators, a specimen collection increases
the reliability of scientific knowledge because:
D. Different scientists can observe and analyze the same items.
Explanation:
Collection of specimen is a prime step in the process of scientific analysis.
These specimen are considered very precious and are kept preserved.
The collection and preservation of specimen is very important to derive reliable scientific knowledge about it because this provides an opportunity to a number of scientists to study the same specimen.
Study of the same specimen by different scientists allows various opinion and theories to come in front.
Several errors in previous investigations are also rectified.
The repeated studies on the same specimen widens the knowledge about the specimen.
Since more than one scientist agree on a conclusion the facts stated by the investigation are considered more authentic.
The primates share several characteristics, which distinguish them from all other mammalian orders. Check all of the unique features that one would use to classify members into this order.a. embryonic development is often assisted by a placenta
b. specialized teeth
c. an opposable thumb
a large and well-developed brain
d. hair
e. binocular vision
Answer:
The correct answer is an opposable thumb, large and well developed brain, and binocular vision.
Explanation:
A primate refers to a member of the mammalian order Primates that constitute two suborders, that is, the anthropoids (apes, monkeys, and human beings) and the prosimians (lorises, lemurs, and tarsiers).
The behavioral and anatomical characteristics, which differentiate primates from other mammalian orders comprise an absence of strong specialization in composition, that is, prehensile feet and hands, generally with great toes and opposable thumbs.
Apart from this, the primates comprise flattened nails in place of claws, acute vision with binocular vision, and comparatively bigger brain demonstrating the extent of cortical folding.
The unique features that distinguish primates from other mammalian orders include embryonic development assisted by a placenta, an opposable thumb, a large and well-developed brain, hair, and binocular vision.
Explanation:The unique features that one would use to classify members into the primate order include:
Embryonic development is often assisted by a placenta: Primates have a complex reproductive system and give birth to live young.An opposable thumb: Primates have thumbs that can be moved against the other fingers, allowing them to grasp and manipulate objects.A large and well-developed brain: Primates have a relatively larger brain compared to their body size, which allows them to exhibit complex cognitive behaviors.Hair: Primates have hair covering their bodies.Binocular vision: Primates have forward-facing eyes that provide depth perception and enhance their ability to judge distances.Learn more about Primate characteristics here:https://brainly.com/question/32507779
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