Ques:Q: Living organisms are comprised of organic compounds, which are molecules built around what element? 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? 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? 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? Choices: - cardiovascular system - respiratory system - muscular system - nervous system A:

Ans:
nervous system
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