Which of the following would be a secondary sexual characteristic?
A. testosterone produced by the testis
B. the development of a menstrual cycle
C. erection of the penis or clitoris
D. the different amount and location of body fat in men and women
D. the different amount and location of body fat in men and women
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Angiosperms use which temporary reproductive structures that are not present in any other group of plants?
A. cones B. carpels C. receptacles D. flowers E. seeds
Which of the following are seed plants?
a. cycads b. ginkgoes c. conifers d. angiosperms e. all of these
Cellular slime molds can be distinguished from
plasmodial slime molds on the basis of a. reproductive structures. b. spore formation. c. number of nuclei per cell. d. slime trails. e. food requirements.
During exponential growth, the per capita rate of increase is:
a. leveling off b. constant c. approaching zero d. approaching the carrying capacity.