many kinds of aquatic animals that are large enough and strong enough to be able to swim against currents and tides and go where they want are referred to as
A. phytoplankton.
B. nekton.
C. benthic creatures.
D. sessile creatures.
B. nekton.
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When a species consisting of a single large population slowly evolves over many generations into a new species, this an example of
A. synapomorphy. B. cladogenesis. C. anagenesis. D. monospeciation. E. horizontal gene transfer.
Morphological characteristics are widely used for taxonomic classifications because they are ____
a. the most likely indicators of evolutionary relationships b. the most likely to represent reproductive isolation among groups c. easy to assess in living, preserved, or fossilized specimens
d. always the exact phenotypic expression of genotypes e. indicative of genetic relatedness
Which of the following statements considering the human body as an ecosystem is incorrect?
A. Lactobacillus acidophilus and Lactobacillus jensenii are populations within the vaginal community. B. The microbes present in dental plaque constitute a community. C. The skin, the gut, and the nasopharynx are all habitats. D. An infection can be considered a habitat's response to an alteration in environmental conditions.
Which sweat glands are the most numerous and are, with few exceptions, distributed over the total body surface?
A. Apocrine B. Sebaceous C. Eccrine D. None of the above