________ coral species are responsible for building reefs in shallow, tropical waters
a. Ahermatypic
b. Broadcast
c. Hermatypic
d. Mesenterial
c
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The embryonic layer found only in bilaterally symmetrical eumetazoans is the ______.
Fill in the blank(s) with the appropriate word(s).
In the Lotka-Volterra equations that represent predator-prey interactions, predators are a source of density-independent mortality for prey
Indicate whether the statement is true or false
Experiments with genetically altered mice showed that the mice would consume abnormally high amounts of bitter-tasting compounds in water after their _____
A) hormone receptors for digestive hormones were reduced or eliminated, showing that bitter tastes are reinforced by digestive responses B) salt-taste cells were altered to express receptors for bitter tastants, suggesting that animals have unregulated salt appetites C) visual sense was reduced or eliminated, suggesting that mice learn visual cues about bitter tastes D) sweet-taste cells were altered to express receptors for bitter tastants, suggesting that the sensation of taste depends only on which taste cell is stimulated
The degree or extent of disease that a pathogen causes is
A) a host factor. B) virulence. C) attenuation. D) pathogenicity. E) toxicity.