The combined effects of inhibitory and excitatory effects on a postsynaptic cell will decide whether that cell generates an action potential. This principle is called ________
A) threshold
B) internalization
C) summation
D) potentiation
C
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Which meiotic phase is matched with the mitotic phase it most closely represents?
a. anaphase I and anaphase b. anaphase II and anaphase
c. metaphase I and metaphase d. interkinesis and telophase e. metaphase II and prophase
Two species of phorid flies are being used to control
fire ants. The fly a. is a parasitoid of the fire ant. b. lays an egg in the ant’s soft internal tissues. c. produces a larva that eats the ant’s interior. d. larva uses the ant’s empty head as a metamorphosis chamber. e. fits all of these descriptions.
DiGeorge syndrome is
A. Characterized by a goiter B. A defect of phagocytic cells C. Characterized by cytotoxic reactions D. Immune deficiency diseases E. Forms of type I hypersensitivity
An event that is thought to have caused mass extinction is the impact of a giant ______.
What will be an ideal response?