Menstruation begins in response to
a. rising levels of FSH and LH.
b. rising levels of GnRH.
c. rising levels of progesterone.
d. falling levels of progesterone.
e. rising levels of estrogen.
D
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Why must mosses live in moist environments?
A. Because they depend on water to reproduce B. Because they are pollinated by fish and aquatic insects C. Because they grow as a mat D. Because they lack a waxy outer layer
If a cell has a 95% concentration of water in its cytoplasm and the environment surrounding the cell has a 90% concentration of water, water will flow
A. into the cell by osmosis. B. out of the cell by active transport. C. out of the cell by osmosis. D. into the cell by active transport. E. into the cell by facilitated diffusion.
If the fossil records of apes and humans alike show a trend toward decreasing larynx size in adult females, and increasing larynx size in adult males, then
A) sexual dimorphism was developing over time in these species. B) intrasexual selection seems to have occurred. C) the ?good genes? hypothesis was refuted by these data. D) stabilizing selection was occurring in these species concerning larynx size. E) selection was acting more directly upon genotype than upon phenotype.
Optimal color vision occurs in the fovea, a depression in the retina where most of the ________ are located
Fill in the blank(s) with correct word