Which of the following is NOT involved in self
versus nonself recognition?
a. complement
b. MHC markers
c. TCRs
d. plasma membranes
e. HLA
Answer: a
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____ is the process by which diverging populations undergo natural selection in favor of enhanced pre-zygotic isolation
Fill in the blank with the appropriate word.
Although especially useful to the giraffe, the rete mirabile is similar to a countercurrent heat exchange system in other related, less evolved, mammals. Thus a mechanism for _________________ homeostasis is likely to have evolved from a mechanism previously used for __________________ homeostasis.
A. blood pressure; pH B. temperature; blood pressure C. blood pressure; temperature D. pH; blood pressure Adult giraffes can be up to 20 ft. tall, and thus require special adaptations to maintain appropriate blood pressure. One adaptation is the rete mirabile, a group of blood vessels that form a web or net-like structure to slow blood flow.
____ is the study of body plans and structures
a. Evolution b. Biogeography c. Comparative morphology d. Comparative physiology e. Natural history
What type(s) of bonds link together the components of a ribosome?
A.) only the types of bonds that involve the sharing of electrons between atoms B.) both the types of bonds that involve the sharing of electrons between atoms and the types of bonds that involve electrostatic interactions between atoms C.) neither the types of bonds that involve the sharing of electrons between atoms nor the types of bonds that involve electrostatic interactions between atoms D.) only the types of bonds that involve electrostatic interactions between atoms