Answer:
Elbow joint
Explanation:
The elbow joint is a type of hinge joint formed by the trochear groove at the distal end of humerus where it fits into the trochlear notch formed by ulna and radius. The olecranon process prevents the lower arm from over-stretching.
The muscles which operate the joints are in pairs and antagonistic. The muscle that straightens the limb is called the extensor muscle.
Radial (lateral) and ulnar (medial) collateral ligaments restrict side-to-side movements of the elbow joint.
Radial collateral ligaments provide crucial stability to the elbow joint, preventing excessive lateral or medial deviation of the forearm bones (radius and ulna) in relation to the humerus.
The radial collateral ligament, located on the lateral aspect of the elbow, serves to stabilize the joint against varus forces, limiting excessive lateral deviation of the forearm. Similarly, the ulnar collateral ligament, positioned on the medial side of the elbow, provides stability against valgus forces, restricting excessive medial deviation of the forearm.
The coordinated action of these ligaments ensures the maintenance of proper joint alignment and function, facilitating the smooth execution of various upper limb movements while protecting the integrity of the elbow joint and minimizing the risk of injury or instability during physical activities.
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The phenotype frequency in a population changes after each generation. Which would most likely be causing this?
Answer:
competition between organisms
Explanation:
apex
The process by which volcanoes vent water vapor, carbon dioxide, nitrogen, and other substances is called ____.
Question 17 options:
oxidation
glaciation
differentiation
outgassing
Answer:
The process by which volcanoes vent water vapor, carbon dioxide, nitrogen, and other substances is called outgassing.
DNA replication allows the basic units of heredity found on segments of DNA, called ___ , to be passed on from parent to offspring.
Answer:
Genes
Explanation:
Genes code for proteins that leads to certain traits to be expressed, leading to phenotype to be seen based on different genotypes expressed.
Answer:
The answer is genes on edg 2020
Explanation:
What is the function of the gametophyte generation of the fern plant? Not multiple choice.
produces reproductive organs which produce a zygote
produces meiospores which grow into a sporophyte plant
produces a new fern asexually
grows as a diploid fern
The function of the gametophyte generation of the fern plant is it produces reproductive organs which produce a zygote.
What is the function of the gametophyte generation of the fern plant? Fern gametophyte is a gametophytic phase in Fern plants that are associated with gamete formation.Ferns exhibit alternations in generations of their life cycle and possess diploid sporophytic and haploid gametophytic stages.It produces reproductive organs which produce a zygote.Zygotes grow into the sporophyte(diploid), and spores grow into the gametophyte(haploid). The sporophyte produces haploid spores through meiosis, gametophyte produces gametes through mitosis.A major function of the gametophyte generation is to produce haploid gametes. The fusion of the egg cell with the sperm cell gives rise to the sporophyte, thereby completing the life cycle. In many lower plants, gametophytes are the dominant and free-living generation.So, the function of the gametophyte generation of the fern plant is it produces reproductive organs which produce a zygote.
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Once an egg has been fertilized: multiple choice
a zygote is formed
a barrier to other sperm forms immediately
new genes are formed
cytoplasm is always exchanged
the zygote becomes haploid
a mature egg is fertilized when it is joined with a sperm cell
the answer is B
Taq polymerase is an enzyme isolated from the organism Thermophilus aquaticus. This organism has been found living in the hot springs of Yellowstone National Park. This enzyme is used to copy human DNA from crime scenes. Most reactions are performed at ranges similar to those of the human body; however, what considerations should be made for optimum use of this enzyme?View Available Hint(s)Taq polymerase is an enzyme isolated from the organism Thermophilus aquaticus. This organism has been found living in the hot springs of Yellowstone National Park. This enzyme is used to copy human DNA from crime scenes. Most reactions are performed at ranges similar to those of the human body; however, what considerations should be made for optimum use of this enzyme?The enzyme will not work on human DNA.Nothing should be altered.The pH should be decreased.The temperature should be raised.
Answer:
The correct option is this: THE TEMPERATURE SHOULD BE RAISED.
Explanation:
The enzyme that is used in Polymerase Chain Reaction (PCR) to copy DNA materials from crime scenes is Taq polymerase. This synthetic enzyme is derived from Thermophilus aquaticus, which is a thermophile bacteria that can tolerate very high temperature. Because of this characteristic, the enzyme derived from this bacteria can not be used in the laboratory at room temperature for the purpose of copying DNA. The temperature has to be raised to a very high level, because the enzyme can only be active at very high temperature.
To obtain optimum use of Taq polymerase, the temperature needs to be raised because it is a heat-stable enzyme. Most reactions are performed at ranges similar to those of the human body, but the enzyme requires higher temperatures to work effectively.
Explanation:Taq polymerase is an enzyme isolated from the organism Thermophilus aquaticus, which lives in the hot springs of Yellowstone National Park. This enzyme is used to copy human DNA from crime scenes. To obtain optimum use of this enzyme, the main consideration is to raise the temperature because Taq polymerase is a heat-stable enzyme. Most reactions are performed at ranges similar to those of the human body, but for Taq polymerase to work efficiently, the temperature needs to be increased to the optimal range.
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Your alarm clock wakes you up and reminds you to get ready for school. Which type of neuron receives the
sound of the aların?
a. motor neurons
b. interneurons
C. sensory neurons
d. myelin neurons
Final answer:
Sensory neurons are responsible for transmitting the sound of an alarm to the central nervous system, making 'c. sensory neurons' the correct answer.
Explanation:
The type of neuron that receives the sound of the alarm and reminds you to get ready for school is a sensory neuron. Sensory neurons are responsible for carrying information from the sensory receptors, which in the case of hearing an alarm would be the ear cells, to the central nervous system (CNS). They essentially take in the information from your environment and send it to the brain where it can be processed. Therefore, the correct answer to the question is c. sensory neurons.
Where can repetition be found in the bolded excerpt from walt whitman's poem?
A.the repetitive use of the word diagrams
B.the repetitive use of the word astronomer
C.the repetitive use of the word when
What organ is the first to receive nutrients that have been absorbed from the digestive tract?
we all have different forms of genes from our parent(s).what are these different forms called?
A.alleles
B.characters
C.DNA
D.resources
Answer:
the answer is allele
Allele. Genes come in more than one form. The different forms are called alleles.
A viral genome is studied. It is composed of 33% Adenine, 28% Thymine, 22% Cytosine and 17% Guanine. Predict whether this genome is single or double stranded and whether it is DNA or RNA based.
A) The genome is DNA based and single stranded.
B) The genome is DNA based and double stranded.
C) The genome is RNA based and single stranded.
D) The genome is RNA based and double stranded.
Answer:
A) The genome is DNA based and single stranded.
Explanation:
The reason why it is DNA based is because DNA contains thymine base (T). It is not RNA based because RNA contains uracil base (U) instead of thymine and in the given question there is not uracil mentioned.
It is single stranded because according to Chargaff's rule a double stranded nucleic acid must have the ratio of purine bases to pyrimidine ratio as 1:1.
Adenine (A) & Guanine (G) are purine bases while Thymine (T) & Cytosine (C) are pyrimidine bases so according to Chargaff's rule AG/CT = ~ 1. It means [A+G] = [C+T]
Also, A makes interaction with T while C makes interaction G. It means,
[A] = [T]
[C] = [G]
By this we can easily infer that a double stranded DNA will have as much A as much it has T & same goes with C & G.
But, in the given question, A = 33% while Thymine = 28% which are not equal so this means that this molecule is single stranded.
which individual below would be considered heterozygous?
A.DD
B.Dd
C.dd
What percentage of someone’s genetic background may contribute to alcohol dependency?
Answer:
The percentage of an individual genetic background that may contribute to alcohol dependency is 50%.
Explanation:
Alcohol dependency refers to a chronic disease in which the affected individual has an uncontrollable urge for alcoholic drinks. There are many factors that can cause one to depend on alcohol and one's genetic background is one of them.
Recently, researchers have been able to identify a specific gene that is responsible for development of alcoholic dependency. Before now, scientific studies have been able to proof that children born by alcoholic parents have high tendency of becoming alcoholic adults. The percentage of genetic heritage that is responsible for alcoholic use is as high as 50%
What percentage does each square in a punnett square represent?
A.25%
B.33%
C.50%
A punnet square is made up of 4 smaller squares.
These all add up to 100%, so each smaller square represents 25%
Answer:
B) 25%
25%
A Punnett square is a four by four diagram used to predict an outcome of a particular cross or breeding experiment.
Because it is four by four, we can deduct that each square is equivalent to 25% since 1/4 = 0.25 or 25%
The main function of cellular respiration is __________.
Answer: The main function of Cellular respiration is to convert glucose into energy source (ATP).
Explanation: Cellular respiration is process in which chemical energy of food is released and turn into ATP. This process incudes three steps: Glycolysis, Kreb Cycle and electron transport chain.
Glucose can not be directly used as energy. By the process of Cellular respiration 1 glucose molecule gives 38 ATP molecules.
Cellular respiration's main function is to produce adenosine triphosphate (ATP), an essential energy source for many cellular processes. This process happens mainly in mitochondria through stages such as glycolysis, the Krebs cycle, and oxidative phosphorylation.
Explanation:The main function of cellular respiration is to produce adenosine triphosphate (ATP), an energy-carrying molecule, from glucose and other organic substances within cells. This process, which occurs predominantly in cellular organelles called mitochondria, involves stages such as glycolysis, the Krebs cycle (or citric acid cycle), and oxidative phosphorylation. ATP serves as a vital energy source for many cellular processes including movement, cell division, and protein synthesis.
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How can you reduce the amount of waste you send to landfills?
Answer:
By reducing , segregating and compressing
Explanation:
The solid waste being sent to the landfill site can be reduced in following ways -
a) Segregating the organic and inorganic waste. Since organic waste can be decomposed, it must be treated separately instead of dumping into landfill.
b) Reducing the volume of solid waste through compressing at waste handling plants instead of directly dumping into land fill sites.
c) All the reusable and recyclable waste such as plastic, paper, glass must also be segregated at the point source.
An example of natural selection is the red color of a male cardinal. The females of the species choose mates based on the vibrant colors of the males' feathers. If females begin using different criteria than feather color when they choose mates, what would most likely happen to the color of the male cardinals over time? increased variation in the shades of red because the selection pressure has been relieved increased variation in the shades of red because the cardinals try different ways to impress the females decreased variation in the shades of red because no form of the trait is advantageous decreased variation in the shades of red because the only reason for variation was selection pressure
Answer:
decreased variation in the shades of red because no form of the trait is advantageous
Explanation:
The last option also seems correct, but selections is somehow aleatory. You cannot consider "reason" as a factor.
Answer:
The correcta answer is opcion B). "decreased variation in the shades of red because no form of the trait is advantageous".
Explanation:
If females choose males for other traits than the red color of feathers, it is probably that the feathers would decrease the variation in the shades of red because no form of the trait is advantageous.
On the one hand, females do not choose males for this characteristic anymore, which means that this color is not advantaging for mating. On the competition with other males, they will have to develop the other trait that makes them look better genetically.
On the other hand, these bright colors make males very visible to predators, a pressure that will make the turn to less bright visible colors for better hiding and fewer chances to get caught.
The use and application of living things and biological processes is known as
a. human biology.
b. medical research.
c. biotechnology.
d. epidemiology.
Answer:
THE ANSWER IS C. BIOTECHNOLOGY
Explanation:
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Which of the following would you need in order to compare the effect of two different fertilizers on plant growth?
a. a way to measure plant growth
b. a variety of plant species
c. a selection of soil types
d. a cardboard box to cover one plant
Answer:
a way to measure plant growth
How does high biodiversity allect an ecosystem?
O
A. It makes the ecosystem able to survive disturbances,
O
B. It allows more introduced species to become invasive,
O
C, prevents disturbances in the ecosystern,
O
D. It makes species more likely to go extinct.
Answer:
A
Explanation:
It makes the ecosystem more stable
a group of students is asking people to determine whether they use plastic bags
The ultimate purpose of respiration:
A. inhale 02 and exhale CO2
B. place oxygen in the lungs
C. place oxygen in the blood
D. deliver oxygen to every blood cell
Answer:
D. deliver oxygen to every blood cell
Explanation:
Respiration is the process by which organisms liberate energy from food by chemical processes. It is more appropriately called cellular respiration as the process occurs in the cell.
During respiration, energy is released from food when oxygen combines with food materials. The waste product is carbondioxide in most cases.
The ultimate purpose of respiration(breathing) is to furnish the body system with oxygen at cellular level for the release of energy.
Highly acidic food items such as lemonade have caused foodborne poisonings when:
Highly acidic food items like lemonade can cause foodborne poisonings when prepared and stored in contaminated conditions, promoting microbial growth.
Highly acidic food items, including lemonade, can be a surprising source of foodborne poisonings when several factors come into play:
Contaminated Ingredients:
The raw ingredients used to prepare lemonade, such as lemons and water, may be contaminated with harmful microorganisms like E. coli or Salmonella.
If these contaminants are not properly washed or treated, they can persist in the final product.
Poor Hygiene Practices: Inadequate handwashing, cross-contamination, and unsanitary food preparation environments can introduce harmful bacteria and viruses into the lemonade during its making.
People handling the food and equipment must adhere to strict hygiene protocols.
Improper Storage: Lemonade is often served chilled, making it important to store it at the right temperature.
If it's left at temperatures favorable for bacterial growth, such as in the "danger zone" (40°F - 140°F or 4°C - 60°C), bacteria can multiply rapidly.
Insufficient Pasteurization or Sterilization: Some homemade lemonade recipes call for pasteurization or sterilization to kill harmful microorganisms.
Failure to do so effectively can leave pathogens intact, posing health risks.
Cross-Contamination: Lemonade is often served in containers and with utensils that may have been in contact with other contaminated surfaces or food items, allowing pathogens to transfer.
Extended Storage: Lemonade left unrefrigerated for extended periods, especially in warm weather, can undergo spoilage, making it unfit for consumption.
The acidity of lemonade alone does not guarantee safety.
It is crucial to maintain strict food safety measures during preparation, storage, and serving to prevent foodborne poisonings caused by pathogenic microorganisms.
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Highly acidic food items can cause foodborne poisonings when contaminated, especially if not pasteurized or properly handled. Foods like lemonade can harbor harmful microorganisms, and the consumption of contaminated acidic foods can pose health risks.
Highly acidic food items such as lemonade have caused foodborne poisonings when they are contaminated and consumed by individuals. These foods and beverages, like lemonade, are capable of supporting the growth of harmful microorganisms if not properly handled or treated. For instance, juices that have not been pasteurized are at a higher risk for causing foodborne illness. Contaminated acidic food items can be especially dangerous because they sometimes mask the presence of harmful bacteria, giving a false sense of safety in their consumption.
Acids, commonly found in the foods we eat, can be corrosive and need to be handled with care. Everyday products like citrus fruits, vinegar, and carbonated sodas contain different types of acids such as citric acid, acetic acid, and phosphoric acid, respectively. Ingesting contaminated acidic foods carries risks, as harmful microorganisms can thrive even in an acidic environment, especially if food safety practices such as adequate cooking, refrigeration, and pasteurization, are not followed.
It's important to ensure that meat, milk, and water are properly treated before consumption to avoid the risks of food poisoning from corrosive agents. Chemical poisoning with corrosive agents can occur by ingesting household products containing dangerous chemicals, indicating that it's not just the acidity that poses a risk but also the potential contamination with pathogens or harmful substances.
What was the first human organ to be successfully transplanted?
Answer:
the first human organ to be successfully transplanted was a kidney.
Explanation:
What must happen before meiosis can begin? A. Four gametes must be produced b. The four tetrads must be pulled apart c. Dna doubles and produces sister chromatids d. The cell membrane pinches together
Answer:
C
Explanation:
The DNA first needs to duplicate in stage Interphase-1.
Answer:C, dna doubles and produces sister chromatids
Explanation:
When a continental tropical air mass influences the United States, what kinds of weather does it bring with it? hot, wet conditions hot, dry conditions cold, dry conditions cold, wet conditions
Answer:
hot, dry conditions
Explanation:
The continental tropical air masses are air masses that form over regions with tropical climate. They form over land, not over water. Because they form over land where the temperatures are high, these air masses are hot and dry. When they move toward the United States, or any other place in the world that is influenced by these air masses, they bring in a sudden change in the weather conditions, bringing in very hot and dry weather. This can be very bad for the health of the people, especially for the ones that have chronic diseases, and it also is very dangerous for the agriculture because these air masses tend to dry the soil and suck out all of its moisture.
Mitosis in plant cells differs from mitosis in animals cells in that plant cells do not have __________, and ___________ involves the formation of a cell plate.
A. centrioles; cytokinesis
B. spindle fibers; cytokinesis
C. anaphase; metaphase
D. centromeres; metaphase
The correct answer to the student's question is A. centrioles; cytokinesis, as plant cells do not have centrioles and cytokinesis in plant cells involves the formation of a cell plate.
Mitosis in plant cells differs from mitosis in animals cells in that plant cells do not have centrioles, and cytokinesis involves the formation of a cell plate. Hence, the correct answer is A. centrioles; cytokinesis.
In animal cells, microtubule-organizing centers called centrioles replicate and assist in the formation of spindle fibers during mitosis. In contrast, plant cells lack centrioles but have a structure known as the MicroTubule Organizing Center (MTOC) that functions similarly during mitosis. During cytokinesis in plant cells, a cell plate is formed by the fusion of vesicles derived from the Golgi apparatus, which eventually develops into a new cell wall separating the two daughter cells. In animal cells, cytokinesis occurs when an actin ring constricts to form a cleavage furrow, which pinches the cell into two separate entities.
Which area pictured below represents the largest reservoir of water on Earth?
A. Area 1 ( I think that its this answer, but I want to make sure its correct)
B. Area 2
C Area 3
D. Area 4
Answer:
C Area 3
Explanation:
The largest reservoir of water on our planet is the ocean and not the clouds.
Water is the most abundant substance on our planet and it is estimated that the vast majority of all water on earth is stored in the ocean, it is no wonder that planet Earth has 70% of its surface covered with water and the most of that water makes up the oceans.
The second largest reservoir of water is glaciers, followed by groundwater and clouds.
Although there is no provided diagram, usually the largest reservoir of water on Earth is the world's oceans, which hold more than 96% of all Earth's water. The correct answer would be the area representing the world's oceans on your diagram.
Explanation:Based on the nature of the question, it appears to be referring to the distribution of water on Earth. Without the specific visuals, it's challenging to provide a definite area; however, it's crucial to know that the largest reservoir of water on Earth is the world's oceans. The oceans account for over 96% of all Earth's water. Whether labeled as Area 1, 2, 3, or 4 in your diagram, the correct answer would be the area representing the oceans. Continue studying Earth's hydrosphere for a better understanding of water distribution on Earth.
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In ferns, the plant structure that produces sperm and egg cells is known as which of the following? A. Sporophyte B. Spores C. Zygote D. Gametophyte
Answer:
The correct option will be option D (Gametophyte).
Explanation:
Ferns are the seedless, vascular plants belonging to the kingdom Pteridophyta. They are one of the most primitive plant type known and shows alternation of generations in their life cycle.
Both asexual (spores, rhizomes, offsets or stems) and sexual methods of reproduction are known in ferns. Diploid sporophyte undergo meiosis to form haploid spores.
Gametophyte forms a special heart-shaped structure called prothallus below which sex organs are present. Archegonium, the female structure contains a single egg while Antheridium, the male structure, contains flagellated sperms.
thus, option D is the correct answer.
Eons are the broadest category of geologic time, and we live in the Phanerozoic eon. The Phanerozoic eon is further divided into eras. What divides the three eras of the Phanerozoic eon?
A. The appearance of carbon on Earth and the appearance of atmospheric oxygen separate the three eras from each other.
B. The development of insects and the development of flying insects separate the three eras from each other.
C. The first life on Earth and the first multicellular life on Earth separate the three eras from each other.
D. Mass extinction events separate the three eras from each other.
Answer:
D. Mass extinction events separate the three eras from each other
Explanation:
The Phanerozoic is an eon, thus it is representative of the largest unit of geological time. It is further divided into three eras. The three eras of the Phanerozoic are the Paleozoic, Mesozoic, and Cenozoic. These three eras have been divided on the basis of mass extinction events. The Paleozoic ends with the mass extinction at the end of the Permian period, which is also the largest mass extinction ever, and it also marks the beginning of the Mesozoic. The Mesozoic ends with the mass extinction at the end of the Cretaceous period, occurring because of a large meteorite or comet impact, marking the beginning of the Cenozoic era. The Cenozoic era is still going, and even though there have been extinction throughout it, none of them has been of a scale big enough to be considered as a mass extinction, so until something like that happens, this era will continue to exist.