Alternation of generations in plants refers to the alternation of:
a. diploid and haploid stages.
b. male and female stages.
c. meiotic and mitotic stages.
d. spore and seed stages.
e. thallus and leaf stages.
A
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Which of the following is NOT density-independent?
a. floods b. earthquakes c. tornadoes d. volcanic eruptions e. disease
Competition among individuals of different species is called
A. intraspecific competition. B. resource competition. C. interspecific competition. D. commensalism. E. basal competition.
Spermatogenesis is governed by _____.
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