A tar-like patch found in the upper North Atlantic supra-intertidal usually is:

a. a lichen.
b. a cyanobacteria.
c. sea hair.
d. a sponge.
e. a seaweed.


B

Biology & Microbiology

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Given a population that contains genetic variation, what is the correct sequence of the following events under the influence of natural selection?

1. Well-adapted individuals leave more offspring than do poorly adapted individuals. 2. A change occurs in the environment. 3. Genetic frequencies within the population change. 4. Poorly adapted individuals have decreased survivorship. A) 2 ? 4 ? 1 ? 3 B) 4 ? 2 ? 1 ? 3 C) 4 ? 1 ? 2 ? 3 D) 4 ? 2 ? 3 ? 1 E) 2 ? 4 ? 3 ? 1

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What would be an easy way to determine if a skull is a mammal's skull? 

A. Look for air sacs in the skull. B. Examine the teeth. C. Look for the remains of the tympanum. D. Measure the brain case volume.

Biology & Microbiology

Eukaryotic cilia and flagella arise from which of the following cellular components?

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Biology & Microbiology