Which structure of a flower traps pollen?
A) style
B) stigma
C) ovary
D) filament
B
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Climate has been proposed to play a role in the latitudinal diversity gradient. Specifically, some have hypothesized that
A. the warm climate of the tropics promotes high speciation rates. B. the warm climate of the tropics promotes niche diversification. C. relatively few species are able to adapt to the harsher, more variable climates of the high latitudes. D. the harsh, more variable climates of the high latitudes reduce speciation rates. E. none of these
Homo sapiens is the name of a species. Homo is the name of a genus. Hominidae is the name of a family. Primate is the name of an order. Mammal is the name of a:
a. phylum. b. domain. c. variety. d. class. e. kingdom.
Nudibranchs usually have two rhinophores. However, if they had a single rhinophore, it could still carry out the function of two rhinophores, and with similar effectiveness, if this single rhinophore _____
A) had two branches, one directed to the left, the other to the right B) was located within the mantle cavity C) was as long as two rhinophores placed end to end D) had cilia whose power strokes directed water away from the surface of the slug
Half of the body's magnesium is stored in the:
A) bones. B) kidneys. C) skeletal muscle. D) extracellular fluid.