The first panel of the sequence in Figure 52-2 reflects:
a. trial-and-error.
b. negative reinforcement.
c. an irrelevant stimulus.
d. the conditioned response.
e. the unconditioned response
E
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The micropyle is ____
a. the mature male gametophyte b. the inner seed coat c. a small opening at one end of an ovule d. a passageway through the style for sperm e. the eight-cell stage of a plant embryo
Monocots and eudicots differ in how xylem and phloem are distributed in ground tissue, in the number of petals in
flowers, and in the number of ____________________. Fill in the blank(s) with the appropriate word(s).
Blood leaving the efferent arteriole enters the ____________________. Fill in the blank(s) with the appropriate word(s)
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A) left ventricle B) left atrium C) right atrium D) right ventricle