Ques:Q: Living organisms are comprised of organic compounds, which are molecules built around what element? Read this paragraph and choose the correct option from the provided answers: Living organisms are comprised of organic compounds, molecules built around the element carbon. Choices: - oxygen - silicon - helium - carbon A:

Ans:carbon
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Ques:Q: What is the study of the similarities and differences in the embryos of different species? Read this paragraph and choose the correct option from the provided answers: Comparative embryology is the study of the similarities and differences in the embryos of different species. Similarities in embryos are evidence of common ancestry. All vertebrate embryos, for example, have gill slits and tails. Most vertebrates, except for fish, lose their gill slits by adulthood. Some of them also lose their tail. In humans, the tail is reduced to the tail bone. Thus, similarities organisms share as embryos may be gone by adulthood. This is why it is valuable to compare organisms in the embryonic stage. See http://www. pbs. org/wgbh/evolution/library/04/2/pdf/l_042_03. pdf for additional information and a comparative diagram of human, monkey, pig, chicken and salamander embryos. Choices: - example embryology - prenatal biology - diversified embryology - comparative embryology A:

Ans:comparative embryology
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Ques:Q: Catecholamines are a class of amine hormones synthesised form which amino acid? Read this paragraph and choose the correct option from the provided answers: Choices: - epinephrine - dopamine - phenylalanine - tyrosine A:

Ans:tyrosine
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Ques:Q: The axon terminates on muscle fibers at the neuromuscular junction. acetylcholine is released at this specialized synapse, which causes the muscle action potential to begin, following a large potential known as an end plate potential. when the lower motor neuron excites the muscle fiber, it contracts. all of this occurs in a fraction of a second, but this story is the basis of how this functions? Read this paragraph and choose the correct option from the provided answers: described in the chapter on muscle tissue, an action potential travels along the motor neuron axon into the periphery. The axon terminates on muscle fibers at the neuromuscular junction. Acetylcholine is released at this specialized synapse, which causes the muscle action potential to begin, following a large potential known as an end plate potential. When the lower motor neuron excites the muscle fiber, it contracts. All of this occurs in a fraction of a second, but this story is the basis of how the nervous system functions. Choices: - cardiovascular system - respiratory system - muscular system - nervous system A:

Ans:
nervous system
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