Answer:
One-half b c sine (60 degrees)
One-half a squared sine (60 degrees)
StartFraction a b sine (60 degrees) Over 2 EndFraction
Explanation:
The area rule states that the area of any triangle is equal to half the product of the lengths of the two sides of the triangle multiplied by the sine of the angle included by the two sides.
From the question, Equilateral triangle refer to a triangle with equal angle and equal sides. The sum of an angle in a triangle = 180°; this implies that each angles have 60°.
∴ the three options that defines the expressions that represent the are of triangle ABC are:
One-half b c sine (60 degrees)
i.e [tex]\frac{1}{2}bcsin60^{0}[/tex]
One-half a squared sine (60 degrees) ; if the two opposite sides posses the same parameters.
i.e [tex]\frac{1}{2}a^{2}sin60^{0}[/tex]
StartFraction a b sine (60 degrees) Over 2 EndFraction
i.e [tex]\frac{absin60^{0}}{2}[/tex]
There are three options that defines the expressions to represent the area of triangle ABC:
One-half bc sin[tex]\bold {60^o}[/tex] One-half a squared sin[tex]\bold {60^o}[/tex] ; if the two opposite sides posses the same parameters. Start Fraction ab sin[tex]\bold {60^o}[/tex] Over 2 End Fraction
Equilateral triangle:
A triangle with equal angle and equal sides. The sum of an angle in a triangle is [tex]\bold {180^o}[/tex] this implies that each angles have [tex]\bold {60^o}[/tex]
The area rule of triangle:
It states that the area of any triangle is equal to half the product of the lengths of the two sides of the triangle, multiplied by the sine of the angle.
Therefore, there are three options that defines the expressions to represent the area of triangle ABC:
One-half bc sin[tex]\bold {60^o}[/tex] One-half a squared sin[tex]\bold {60^o}[/tex] ; if the two opposite sides posses the same parameters. Start Fraction ab sin[tex]\bold {60^o}[/tex] Over 2 End Fraction
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In the scientific name, Pan paniscus, Pan represents the name of the ____ while paniscus represents the name of the ____.
Answer:
genus, specie
Explanation:
The binomial nomenclature is a naming system used by scientists to identify organisms, it's composed by two words, the first refer's to the individual's genus, a small group of closely related organisms, and the second word is the specific name or epithet used to diffetentiate species in the same genus.
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Which of the following would likely reduce the threats posed by exotic species to native species?I. Increasing inspections of goods coming into a country.II. Mandating that bilge water from vessels be emptied in ports instead of the open ocean.III. Enforcing legislation that restricts imported materials such as untreated wooden packing crates.a. I onlyb. II onlyc. III onlyd. I and III onlye. I, II, and III
Answer:
A. I only
Explanation:
Exotic animal species are really found in most countries and given that people these animals, they are very valuable. Species like lions, tigers, parrots, cheaters and even pythons are loved for exotic nature.
For this reason, they are caught, killed, shipped and sold in various countries or regions like dubia, Saudi Arabia etc. Its effects on the population of these species are disastrous.
If the inspection of goods coming into a country is intense and frequent, it will mitigate the shipping and sales of the species.
All three measures, I, II, and III, are strategies that reduce the threats from exotic species to native species by focusing on prevention and management at ports of entry and in goods transport.
Explanation:The threats posed by exotic species to native species can be significantly reduced by implementing a combination of strategies that focus on prevention and management. Measures such as increasing inspections of goods entering a country can help detect potential invasive species before they enter new environments. Additionally, practices like mandating the disposal of bilge water from vessels in ports instead of the open ocean can prevent the introduction of marine organisms that may become invasive. Enforcement of regulations that restrict imported materials, such as untreated wooden packing crates, can also limit the likelihood of invasive species hitchhiking into a country. Therefore, all three listed measures, I, II, and III, collaboratively contribute to reducing the risks associated with exotic species.
Arrange in the correct sequence these components of the mammalian immune system as it first responds to a pathogen.I) Pathogen is destroyed.II) Lymphocytes secrete antibodies.III) Antigens from a pathogen bind to antigen receptors on lymphocytes.IV) Lymphocytes specific to antigens from a pathogen become numerous. V) Only memory cells remain.a. I â III â II â IV â Vb. II â I â IV â III â Vc. IV â II â III â I â Vd. III â IV â II â I â V
Answer:
The answer is d. 3,4,2,1,5
Explanation:
The correct sequence is:
Antigens from a pathogen bind to antigen receptors on Lymphocytes.Lymphocyte specific to antigens from a pathogen become numerous.Lymphocytes secrete antibodiesPathogen is destroyed.Only memory cells remain.Adaptive Immune System/Acquired Immunity:
Adaptive immune system involves the part of immune system that is contains specific and highly specialized cells to target specific pathogens. Acquired immunity involves antigen specific antibodies that bind and mark a specific pathogen. This pathogen is then cytotoxically destroyed by specific effector cells of the immune system. Acquired immunity is also characterized by the production of memory cells at the time of mass production of antigen specific antibodies. These memory cells remain long after the pathogen has been destroyed to protect against consequent attacks from the same pathogen.
Answer:
III → IV → II → I → V
Explanation:
A client comes into the urgent care center to have sutures removed on an arm. The nurse finds significant crusting along the suture line. The client claims to have not had time to get the sutures removed a week prior, as directed. The nurse soaks the crust and attempts to remove the sutures. As the nurse attempts the suture removal, the client frequently pulls the arm away and tells the nurse, "You do not know what you are doing." In response, the nurse should answer:
A. "I am sorry this is hurting but you are hurting my feelings."
B. "You are the cause of the problem here. I do not have to tolerate this behavior, and you are free to leave."
C. "How would you know if I know what I am doing or not?"
D. "Sir, I understand this is uncomfortable, but I assure you I am experienced with this task and would like to continue."
The nurse should respond with patience and professionalism, reassuring the client of their competency, while acknowledging the client's discomfort.
Explanation:In a health care setting, it is essential for healthcare professionals to maintain patience and professionalism, even when dealing with difficult patients. Based on the options provided, the best response the nurse can make in this scenario is:
D. "Sir, I understand this is uncomfortable, but I assure you I am experienced with this task and would like to continue."
This response displays empathy toward the client's discomfort but also reassures the client about the nurse's competency and experience. The other options are not professional and do not adequately address the client's concerns or behaviors.
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what accounts for the similarities in life forms found in the same type of biome in geographically separated areas?
Explanation:
It is due to convergent evolution, which is the mechanism by which non-related organisms evolve similar characteristics separately as a result of having to acclimate to similar environments.
The analogous nature of insect wings, birds, pterosaurs, and bats is an example of this. All four serves the same purpose and in form are identical, but each has developed differently, not from a single winged ancestor.
Why can many different species coexist and thrive in areas close to the equator?
Answer:
Equatorial climatic conditions discourage any one species from dominating the ecosystem and encourage biodiversity
Explanation:
The most significant difference between archaea and bacteria is the:
a. presence of a single filament flagellum in bacteria.
b. absence of peptidoglycans in the cell walls of archaea.
c. absence of the 70S ribosomes in bacteria.
d. presence of fatty acids in the plasma membranes of archaea
Answer:
b. absence of peptidoglycans in the cell walls of archaea.
Explanation:
Archaea is a domain of unicellular organism (procaryotes) that live in extreme environments, their cell walls are made of pseudo peptidoglycan (similar in function to peptidoglycans but different in structure), on the other hand, bacteria's cell walls are made of peptidoglycan and lipopolysaccharide.
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Match the following. 1 . cytokinesis The chemical unit or building block of protein 2 . protein Having two layers 3 . biochemical A chemical substance coming from an organism 4 . bilayer Rod-shaped structure contains the genes 5 . glucose Causes the separation of the cytoplasm 6 . polar Segments of DNA contained on chromosomes 7 . nucleic acid Blood sugar used by the cells in the production of energy 8 . phospholipid A group of biochemicals including DNA and RNA 9 . amino acid Makes up the plasma membrane together with protein 10 . genes Having slightly negative and positive charged ends 11 . chromosome A long chain molecule made up of amino acids
Answer:
1.cytokinesis ----Causes the separation of the cytoplasm
2 . protein ----A long chain molecule made up of amino acids
3 . biochemical ---A chemical substance coming from an organism
4 . bilayer ---Having two layers
5 . glucose ----Blood sugar used by the cells in the production of energy
6 . polar ----Having slightly negative and positive charged ends
7 . nucleic acid ----A group of biochemicals including DNA and RNA
8 . phospholipid ----Makes up the plasma membrane together with protein
9 . amino acid---The chemical unit or building block of protein
10 . genes-----Segments of DNA contained on chromosomes
11 . chromosome ----Rod-shaped structure contains the genes
To prevent fecal-to-oral transmission of pathogenic microorganisms, it is important to __________.
Answer:
Wash hands after using the washroom.
Explanation:
Fecal oral transmission also known as oral fecal route, this transmission is defined as the route of the disease where pathogens which are present in fecal particles passes from person to the mouth.
Some common example of fecal oral transmission are fluids, fingers, flies, and food. Main cause of this transmission are poor hygiene practices, and lack of adequate sanitation.
The hormone __________ stimulates the secretion of pancreatic digestive enzymes and stimulates gallbladder contraction.
a. Gastrin
b. Secretin
c. Cholecystokinin
d. Somatostatin
Answer: option B) Secretin
Explanation:
Secretin is an enzyme formed by the upper intestinal layer and gets transported by blood to the PANCREAS which it stimulates: causing the flow of pancreatic juice, also the flow of bile and intestinal juice but to a lesser extent.
Alongside Gastrin, Secretin is one of the hormones of the Gastrointestinal tract; but their functions differ
Therefore, Secretin is the answer
Increased force output of the synergists for hip extension to compensate for the weakened gluteus maximus is an example of which of the following?
a. Wolff's law
b. Synergistic dominance
c. Autogenic inhibition
d. Davis's law
Answer:
b. Synergistic dominance
Explanation:
The stabilizing muscles will always be synergistic, since only from the synergies (hence the term synergist) that arise from joint work is efficient and controlled movement possible. However, not all synergists will be stabilizers. Stabilizer will be one that, thanks to the geometric arrangement of its fibers, will have the ability to maintain alignment in the joint and stable the axis of rotation.
In the case of knee extension, we would have as stabilizers all the antagonists who, because the flexion axis is virtual and not physical, must maintain the stability of said axis. If the axle were physical, such as the wheel in a horse carriage, or on a skateboard through the bearings, the antagonistic muscles would not be necessary for this purpose, because the fixed axis would maintain the position. Since the joints of living beings do not have a fixed physical axis, it is the muscles themselves, specifically the antagonists, who must be responsible for maintaining the stability of the joint creating a virtual axis on which rotation occurs.
What is the subcutaneous layer that separates the integument from the deep fascia around other organs?
Answer:
Answer is hypodermis .
Explanation:
The hypodermis which is also known as the subcutaneous tissue layer, is found lying beneath the dermis and act as a passageway or channel through which blood vessels and nerves passed. It is made up of fat and connective tissues.
It acts as an insulator, this, help in keeping the body temperature stable.
The enzyme through which hydrogen ions (H ) travel back into the cell after being transported outside the membrane by the electron transport chain is called:_________.
Answer:
The correct answer is - ATP synthase.
Explanation:
The role of ATP synthase which is an enzyme highly present in all domains of living organisms by converting into chemical energy by producing ATP which is essential for the most of the cellular functions and reactions.
The proton or hydrogen ion is pumped during the electron transport chain is used to synthesize ATP. Protons move back into the matrix once it transported outside the cell.
Thus, the correct answer is - ATP synthase.
You are called urgently to examine a term, 2-hour-old newborn who has had temperature instability, difficulty with feeding, and a sus- pected seizure. He has atypical facies (wide-set eyes, a prominent nose, and a small mandible), a cleft palate, and a holosystolic murmur. Stat laboratory tests and chest radiograph reveal marked hypocalcemia, a boot-shaped heart, and no apparent thymus. Which of the following is the most likely diagnosis?
A. Ataxia–telangiectasia
B. DiGeorgesyndrome
C. Hyper-IgE syndrome
D. SCID
E. Wiskott-Aldrich syndrome
Answer:
Answer is B. DiGeorge syndrome.
Explanation:
DiGeorge syndrome is a disorder which is caused when part of chromosome 22 is missing. This results in several body systems developing poorly. It is caused when there is abnormal formation of certain issues during fetal development.
One of the symptoms is epileptic seizure.
DiGeorge syndrome is also referred to as the velocardiofacial syndrome.
The duck-billed platypus delivers its venom through what?
Answer:Spurs on it's hindlimbs
Explanation:the duck-billed platypus is has Spurs on it's hindlimbs that's secretes venom.this venom is for mating purpose and it's present only in males
The male duck-billed platypus has sharp spurs on its hind legs that deliver venom, causing severe pain and swelling. This is mainly used during territorial disputes in the mating season.
The duck-billed platypus delivers its venom through a pair of sharp spurs on the hind legs near the ankle, which are connected to a venom-producing gland in the thigh. This venom consists of a mixture of neuroactive peptides, which are short proteins. The male platypus uses his venomous barbs predominantly during mating season when competing for territory. While not typically lethal, a platypus's venom can cause severe pain and swelling that persists for an extended period.
Which action could lead to foodborne illness from cross-contamination?
a) thawing meat at room temperature
b) failing to quickly refrigerate cut up fruit
c) eating chicken that is not fully cooked
d) chopping meat and vegetables on the same cutting board
Answer:
The correct answer is d) chopping meat and vegetables on the same cutting board.
Explanation:
There should be two different cutting boards for chopping meat and vegetable separately to prevent cross-contamination. Raw meat may have lots of pathogenic bacteria like Salmonella, Shigella, E.coli, Listeria, etc which can contaminate the board and the vegetable which is cut on the same board.
So if you consume the contaminated food then you can get foodborne illnesses. Therefore separate board should be used for cutting veg and non-veg items and the board should be washed with soapy water after each use to wash the remaining bacteria from board. So the right answer is d.
Answer:
d
Explanation:
Dona is interested in cutting back on her calorie intake. Which nutrient offers the highest number of calories per gram?
1. Fat 2. Carbs 3. Protein 4. Vitamins
Answer:
The correct answer will be option- Fats
Explanation:
The cellular respiration can produce energy from the three substrates: Carbohydrates, proteins and Fat, the most favoured of which is Carbohydrates.
The Carbohydrates on oxidation produces 4 calories per gram, proteins also produce 4 calories per gram whereas Fats produces 9 calories per gram.
The Fats produces the highest amount of energy as fats require more oxidation to release water and carbon dioxide as compared to Carbohydrates.
Since fats provide the highest amount of energy, therefore, option- fat is the correct answer.
All your cells contain proto-oncogenes, which can change into cancer-causing genes. Why do cells possess such potential time bombs?
The given question is incomplete. The complete question is:
Question: All your cells contain proto-oncogenes, which can change into cancer-causing genes. Why do cells possess such potential time bombs?
A. Cells produce proto-oncogenes as a by-product of mitosis.
B. Proto-oncogenes are necessary for the normal control of cell growth and division.
C. Proto-oncogenes protect cells from infection by cancer-causing viruses.
D. Proto-oncogenes are unavoidable environmental carcinogens.
E. Proto-oncogenes are genetic junk that has not yet been eliminated by natural selection.
Answer:
B. Proto-oncogenes are necessary for the normal control of cell growth and division.
Explanation:
The process of cell division is under tight regulation by a family of extracellular growth factors, specific proteins that trigger cell division and the tumor suppressor genes that normally inhibit cell division. Defects in these genes can lead to cancer.
For example, the protein encoded by tumor suppressor gene p53 stimulates the synthesis of p21 which in turn inhibits the cyclin-cdk2 to block entry of G1 cells into the S phase until the DNA is repaired. Mutations in tumor suppressor genes retinoblastoma and p53 allow cells to proceed to the S phase irrespective of DNA repair.
Likewise, a mutation in ras proto-oncogene encodes a protein with no GTPase activity. The mutant Ras protein is always in its activated form, regardless of the signals from normal receptors. This makes the cells to divide in an uncontrolled manner.
Proto-oncogenes are genes essential for normal cell function, however, when mutated, they may cause uncontrolled cell division leading to cancer. Other factors, such as underactive tumor suppressor genes and epigenetic changes, can also contribute to cancer development. Active research is underway to utilize the reversibility of these changes for cancer treatment.
Explanation:Every cell in our body contains proto-oncogenes, which are essential for normal cell function and growth. However, these can mutate into oncogenes, setting off the equivalent of biological 'bombs' by causing uncontrolled cell proliferation, leading to cancers such as Burkett's Lymphoma. Proto-oncogenes and tumor suppressor genes work in tandem, like the accelerator and brakes of a car, to control cell cycle. Unwanted cell division and proliferation can occur due to three main scenarios: proto-oncogenes becoming overactive, tumor suppressor genes becoming underactive, or through epigenetic alterations.
Epigenetic changes such as methylation and deacetylation can silence genes, and these changes are common in cancer. Because these changes are temporary and reversible, designing drugs and therapies that can reverse these changes is an area of active research in cancer treatment.
Other proteins that influence the cell cycle, in addition to cyclins and cell-surface receptors for growth factors, have potential oncogenetic properties. An example is the Cdk gene, which when altered, can speed up cell cycle progression.
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3. A farmer notices that one group of his plants is producing twice as much corn as the plants in a second field. He wants to know how he can double his production in all his fields. This is an example of which step of the Scientific Method? (1 point)
Answer: observation
Explanation: scientific method is the process which scientists use to provide an accurate and reliable explanation to a phenomenon.
It usually involves the observation and description of a occurrence,the formulation of hypothesis to explain the occurrence and then experiments to test the accuracy of the hypothesis.the experiments may prove the hypothesis right or prove it wrong,in which case the hypothesis may be modified or discarded.
In this case the farmer has noticed the yields in his crops and he might bring an explanation(hypothesis) that seems reasonable to him and will have to test the hypothesis to verify it.
A leukocyte is responsible for: bringing oxygen to the other body cells fighting disease by phagocytosis or antibody production causing muscle contraction conducting nervous impulses throughout the body
Final answer:
A leukocyte, or white blood cell, is vital in the immune system, responsible for defending the body against disease through phagocytosis or antibody production.
Explanation:
A leukocyte, commonly known as a white blood cell (or WBC), is an integral component of the immune system responsible for protecting the body against illness. Leukocytes engage in various defense mechanisms, including phagocytosis and antibody production.
Neutrophils and macrophages are types of leukocytes that actively engulf and digest pathogens, a process known as phagocytosis. Other leukocytes, such as lymphocytes, primarily function in the immune response by making antibodies tailored to foreign antigens.
Additionally, leukocytes are involved in inflammation, an immune response that helps to isolate and heal the affected area.
Using the principle of independent assortment, complete the Punnett square to show the results of an F1 cross between two individuals heterozygous for both pod color (C = green and c = yellow) and pod shape (S = smooth and s + constricted). The gametes and some of the genotypes of the F2 offspring are given.
Answer:
9:3:3:1 ( 9 dominant pod color and shape, 3 heterozygous pod color and homozygous recessive pod shape, 3 homozygous recessive pod color and heterozygous pod shape and 1 recessive homozygous pod color and pod shape)
Explanation:
Mendel's law of independent assortment posits that the alleles of two (or more) different genes get assorted into gametes independently of one another. This implies that the allele a gamete receives for one gene does not influence the allele received for another gene.
In the question given;
We will take a critical look at the cross between two pure-breeding pod color and pod shape:
Pod color (green) = C
Pod color (yellow) = c
Pod Shape (smooth) = S
Pod shape (constricted) = s
The F1 progency of the cross between the heterozygous pod color and pod shape will be:
Cc × Ss
= CS, Cs, cS, cs
From the question, we are to complete the punnett square of the results of the F1 generation, i.e if the F1 progeny assorts independently, what will be the results (F2 generation)
i.e : CS, Cs, cS, cs × CS, Cs, cS, cs
The Punnet Square is in the attached file below.
The results of this dihybrid cross are as follows:
CCSS, CCSs, CCSS, CcSs, CCSs, CcSs, CcSS, CcSs, CcSs (all dominant pod color and shape) "9"
CCss, Ccss, Ccss (heterozygous pod color and homozygous recessive pod shape) "3"
ccSS, ccSs, ccSs (homozygous recessive pod color and heterozygous pod shape)
ccss (recessive homozygous pod color and pod shape)
We can therefore conclude that the results of the Punnet Square of the F1 generation is in the ratio of 9:3:3:1
The oxygen that is released as o2 during photosynthesis came from _____________ molecules.
Answer:
Water (H2O)
Explanation:
Light reactions of photosynthesis release oxygen as a by-product. In the presence of sunlight, photolysis of water molecules occurs. Splitting of two water molecules obtains four electrons, four protons, and molecular oxygen. The oxygen-evolving complex, also called the water-splitting complex is associated with photosystem II (PS II). Splitting of water occurs in the oxygen evolving complex and the released electrons are passed one at a time to the reaction center of PS II. Therefore, a water molecule serves as a source of oxygen released during photosynthesis.
The oxygen (O2) released during photosynthesis comes from water molecules. This happens during the light-dependent reactions of photosynthesis where water molecules are split and oxygen is released as a by-product.
Explanation:
The oxygen that is released as O2 during photosynthesis comes from water molecules. The process of photosynthesis occurs in plants, algae, and some bacteria where light energy typically from the sun is used to convert carbon dioxide and water into glucose (a sugar) and oxygen. In detail, during the light-dependent reactions of photosynthesis, water molecules are split, thereby releasing oxygen as a by-product. This oxygen is what we, and other animals, breathe.
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The best indication that dreaming serves a necessary biological function is provided by the fact that________.
Answer:
most organisms, especially mammals experience what is known as REM rebound.
Explanation:
An increasing frequency of rapid eye movement [ REM sleep] that occurs after period of sleep deprivation is regarded as REM rebound.
The REM sleep is described to be important for normal brain development especially in the infants, because ,it stimulates part or region of the brain used in learning. This is why, infants are believed to spend more time in REM sleep than the adults.
Note that, REM means Rapid Eye Movement.
A pedigree is not helpful to a counselor in predicting the probability of a recessive gene being present and the chances for an offspring to receive the gene and express the trait.
A. true
B. false
Answer:
False i got this 100% correct on mine!
_____ was the first taxonomist to group animals by blood color and plants by size and shape. 1. aristotle 2. linneaus 3. adam 4. cordus
Answer:
Answer is Aristotle.
Explanation:
Aristotle was a pioneer in the field of philosophy and science. This is because of his contributions to these fields.
He was considered as the first person to developed the classification system, where he grouped organisms into two, namely plants and animals. He also created subgroups for these two major groups.
Plant subgroup are small, medium and large.
Animal subgroup are Water, land , Air.
The classification system of Aristotle was considered as not very good because of some reasons. For example, he grouped everything that can fly together, that is, flying insects and some birds that can fly were grouped together, while birds that couldn't fly were left out of the group.
What are possible negative effects of building a hydropower dam? Select the two correct answers.
1. decreased sanitation in the city
2. displacement of people living near the proposed dam
3. lower river water levels in other areas
4. decreased economic activity
5. increased water prices
Answer:
Decreased sanitation in the city / Displacement of people living near the proposed dam
Explanation:
Answer:
2. displacement of people living near the proposed dam
3. lower river water levels in other areas
Explanation:
A hydroelectric dam aims to dam and store water, the raw material for the production of hydroelectric energy. It is also the function of the dam to obtain the necessary gap to rotate the turbines of the generating units.
The hydroelectric dam can bring numerous benefits to society, however not everything is perfect when it comes to the use of hydroelectric energy, as there are also several problems related to this resource, among which we can mention: the displacement of people who live near the proposed dam , lower levels of river water in other areas, deforestation, loss of ecosystem balance, among others.
Considered the "Command Center for the Endocrine System", the ______________ is a major link between the nervous and endocrine system as it is a major regulatory center in the nervous system, as well as a crucial endocrine gland that can synthesize at least nine different hormones.
a. hypothalamusb. thalamusc. epithalamusd. midbraine. pons
Answer: A hypothalamus
Explanation:
You are a conservation biologist, studying genetic variation in three populations of an endangered species of ladybug beetle. Population 1 has 20 beetles, two of which have brown spots, a recessive trait; the other nine beetles have red spots. Population 2 has 150 beetles and 15 of them have brown spots, while 135 have red spots. Population 3 has 50 beetles, and five of them have brown spots. In which population is the frequency of the allele for brown spots the highest?
Answer:
Let's add the options to complete the question
a. Population 1
b. Population 2
c. Population 3
d. The frequency for allele for Brown spot is the same in all three populations
e. It is not possible to answer this question from the given data
The RIGHT ANSWER IS e
e. It is not possible to answer this question from the given data
Explanation:
It is not possible to answer this question from the given data because some variables or information are missing
In comparing three populations of ladybug beetles, the frequency of the allele for the recessive brown spots trait (calculated as the square root of the phenotype frequency) is the same across all populations (0.3162). Therefore, the frequency of the brown spot allele is equally high in all three populations.
We need to apply the principles of population genetics and use the Hardy-Weinberg formula. Population 1 has 20 beetles with a frequency of brown-spotted beetles of 2/20. Population 2 has 150 beetles with a brown spot frequency of 15/150. Population 3 has 50 beetles with a brown spot frequency of 5/50.
In each case, the frequency of the recessive allele (r) representing brown spots can be calculated as the square root of the frequency of the recessive phenotype, since all brown beetles are homozygous recessive (rr).
Population 1:
Frequency of rr = 2/20 or 0.1.
Frequency of r allele = √0.1 = 0.3162.
Population 2:
Frequency of rr = 15/150 or 0.1.
Frequency of r allele = √0.1 = 0.3162.
Population 3:
Frequency of rr = 5/50 or 0.1.
Frequency of r allele = √0.1 = 0.3162.
Interestingly, in all three populations, the frequency of the allele for brown spots is the same (0.3162). So, the answer is that all three populations have the same highest frequency of the recessive allele for brown spots.
Which of the following is the term for an abnormally low white blood cell count?
Answer:
The correct answer is- Leukopenia
Explanation:
White blood cells are present in our blood which protect our body from foreign antigens like bacteria, viruses, etc. When these white blood cells decrease abnormally in number then this condition is called leukopenia.
White blood cells contain different cell which protect our body from different type of infections. So there are different types of leukopenia according to the particular white blood cell whose number became low.
For example when neutrophils number in the body decrease it is called neutropenia. So the correct answer is leukopenia.
Leukopenia is the term for an abnormally low white blood cell count which increases individual's risk for disease due to immune system weakness.
Explanation:The term for an abnormally low white blood cell count is Leukopenia. This condition occurs when too few leukocytes (white blood cells) are in the blood. A low white blood cell count leaves the individual at a higher risk for disease since these cells play a significant role in the immune system. Their production begins in the bone marrow, and abnormalities with this can cause deficient counts. Matters are further complicated when abnormally low lymphocyte counts occur, as a result of chronic illness or immunosuppression.
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What are the most common cells that line the surface of the alveoli and are therefore associated with the exchange of gases within the lungs?
Answer: The epithelial cells
The endothelial cells .
The epithelial cells are pulmonary while the endothelial are vascular
These cells exist as tight-two celled structure for gas exchange in the lungs
They are moistened , thin layered , and use diffuse gradient of oxygen and carbon dioxide to move gases across their wall.s
They are well lined with blood capillaries for rapid absorption of gases into the blood stream,