A pollen grain coat is composed of which of
the following?
a. sporopollenin
b. cellulose
c. peptidoglycan
d. exopolysaccharides
e. none of these
A
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Caterpillars of the same species on a large leaf each chew as much leaf as they can. This is an example of
A. amensalism. B. interference competition. C. exploitation competition. D. commensalism. E. interspecific competition.
Plant cuticles, which reduce water loss, are primarily made of:
a. steroids b. triglycerides c. oils d. waxes e. fats
WASH initiatives are public health initiatives that address WAter, Sanitation, and Hygiene. Which of the following diseases would not be expected to show a decrease in prevalence following a successful WASH campaign?
A. Clostridium difficile infection B. Entamoeba infection C. Schistosomiasis D. Shigella infection E. Ascaris lumbricoides infection
In an analysis of independent contrast, researchers found that fetuses had faster growth rates in polyandrous than in monogamous species of primates. How did the researchers interpret the results?
a. Fetuses develop faster to "make room" for offspring from a different male. b. Extracting more resources from the mother maximizes offspring's inclusive fitness in polyan-drous species. c. Fast fetal growth rates are always optimal. d. Fetal growth rates represent phylogenetic constraints and are unrelated to mating system.