The exposure of plants to low temperatures in order to stimulate flowering is called
a. cryptotropism.
b. thigmotropism.
c. vernalization.
d. florigen.
e. cryotropism.
C
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The immature male gametophytes of angiosperms develop in ____ contained within ____
a. ovaries; carpels b. anthers; stigmas c. pollen grains; carpels d. pollen sacs; anthers e. stigmas; stamens
contains enzymes that transfer hydrogen from various substrates to oxygen, producing
A. lysosome B. vacuole C. mitochondrion D. Golgi apparatus E. peroxisome
A set-point mechanism for body weight should make it virtually impossible for an adult to:
(a) maintain a stable body weight (b) gain large amounts of weight (c) lose large amounts of weight (d) both b and c