Overhunting of species, such as tigers, reduces their numbers and their genetic diversity. This is an example of _____
a. a bottleneck
b. a mutation
c. a founder effect
d. gene flow
e. genetic drift
ANSWER: a
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Cows are able to survive on a diet consisting almost entirely of cellulose because
A. cows are autotrophic. B. the cow, like the rabbit, ingests its feces. C. cows can manufacture all 20 amino acids out of sugars in the liver. D. unlike humans, the saliva the cow produces has enzymes capable of digesting cellulose. E. cows have cellulose-digesting, symbiotic microorganisms in their rumens.
Diploid cells of animals and plants are genetically similar to fungal
A. monokaryotic hyphae. B. dikaryotic hyphae (1n+1n). C. homokaryotic hyphae. D. spores. E. triploid cells.
What phylum of algae is almost exclusively composed of marine inhabitants?
a. Chlorophyta b. Phaeophyta c. Rhodophyta d. Anthophyta
A patient has had a cough, fever, and night sweats for many weeks. Now, sores on the mucous membranes of his mouth are appearing. His history states he spent time in the jungles of Central America. He may be suffering from
A) paracoccidioidimycosis. B) histoplasmosis. C) blastomycosis. D) aspergillosis. E) coccidioidomycoses.