In the taxonomic hierarchy, a family consists of a group of similar
a. orders.
b. classes.
c. species.
d. genera.
e. domains.
D
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The relevance of the pseudocoelom to phylogeny has been questioned. Rotifera and Nematoda both have a pseudocoelom. The molecular evidence suggests which of the following conclusions?
A. Molecular evidence confirms that rotifers and nematodes are closely related and that both participate in the same monophyletic clade. B. Rotifers are more closely related to Lophotrochozoa than to nematodes. C. Rotifers are more closely related to echinoderms than to nematodes. D. Rotifers are more closely related to chordates than to nematodes. E. Rotifers are more closely related to nematodes than to mollusks.
The abyssal zone is one of the zones of the pelagic division
Indicate whether the statement is true or false
Testosterone is produced and secreted by
a) spermatogonia b) sustentacular cells c) seminiferous tubules d) interstitial cells
The Acadian flycatcher, Willow flycatcher, and Least flycatcher are morphologically very similar, but live in different habitats and do not reproduce with one another. Which species concept would be the most useful in determining if these flycatchers are different species? Explain.
What will be an ideal response?