Four of the five answers listed below are
events that lead to secondary succession. Select
the EXCEPTION.
a. opening the canopy in a tropical rain forest
b. abandoning a cotton field
c. retreat of a glacier in Alaska
d. the finish of a fire
e. growth of weeds in a lawn that is not
mowed
C
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Select the phrases that can be associated with intersexual selection
A. peahens choosing peacocks with greater number of eyespots in their tail feathers B. males fighting males to win a territory C. mate choice D. sexual selection within a sex
In men, as testosterone levels increase, LH levels
A) increase. B) move up or down depending on the point in the cycle. C) remain the same. D) decrease.
The enzyme used to make a DNA copy complementary to processed mRNA is
A. reverse transcriptase. B. transcriptase. C. DNA polymerase. D. RNA polymerase.
Mycoplasmas are pleomorphic because they
A) have no cell walls. B) are low G + C content Gram-positive bacteria. C) exhibit snapping division. D) have sterols in their cytoplasmic membranes. E) produce endospores.