Ask a question about fever at each of Tinbergen's four levels (1, 2, 3, and 4)of explanation. Limit your answer to one sentence for each level
What will be an ideal response?
ANS:
Answers may vary, but could include: Level 1, how does an infection elicit the body's fever response? Level 2, does a particular diet lead to stronger fever responses? Level 3, why is a fever response maintained in a pop-ulation despite the fitness costs of fever? Level 4, did a fever response evolve just once or multiple times?
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When muscles cells are deprived of oxygen, the heart still pumps. What must the heart cells be able to do?
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If a substance is a neurotransmitter, stimulation of the presynaptic cell should have the same effect as
a. direct application of the proposed substance to the postsynaptic cell. b. stimulation of the postsynaptic cell. c. blocking receptors on the postsynaptic cell. d. inactivating the substance.
What part of our skeleton most resembles an exoskeleton?
What will be an ideal response?
Which of these is not part of a seed?
A. Seed coat B. Fruit C. Diploid cells D. Endosperm E. Embryo