Which of the following is not a function of an antibody?
A) stimulate helper T cells B) neutralize toxins
C) attract phagocytes D) activate complement cascade
Answer: A
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Which type of cell signaling does not rely on the diffusion of a chemical signal molecule?
A. juxtacrine B. paracrine C. autocrine D. endocrine E. All of these choices are correct.
Schistosomiasis has increased in areas where
A. snails have become a delicacy. B. crayfish are eaten. C. dams have been built. D. swamps have been drained.
Which of the following are fetal membranes? (Check all that apply.)
_____ chorion _____ endometrium _____ allantois _____ amnion _____ yolk sac
In the experiment on limb length in tetrapods that was conducted by Davis and Colleagues, a mouse with which genotype would lack defects in limb formation?
A. AaBb B. AaBB C. AABb D. AAbb