A phylogenetic event horizon is:

a. a point in the future in which species will diversify.
b. a phylogeny based on extinct species.
c. the point at which life started.
d. a point in the history of life beyond which phylogenetic analysis cannot see.


D

Biology & Microbiology

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In the United States, about __________ teenagers

join the ranks of habitual smokers each day. a. 1,000 b. 2,000 c. 3,000 d. 4,000 e. 5,000

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An increase in urine production could cause

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