An ecosystem

a. includes populations but not habitats.
b. is the same as a community.
c. consists of a community and the physical and chemical environment.
d. is none of the above.


a

Biology & Microbiology

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At pH 11, a peptide with the sequence G-M-G-V-S-D-P-D-A has the net charge of:

A. -3 B. -2 C. -1 D. +1 E. +2

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Which population is more likely to be affected by genetic drift?

a. 12 squirrels in a forest b. 49 herons in a colony c. 215 fleas on a dog d. 1350 mice in a house e. 3000 zebra in a herd

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Body parts that are similar in different lineages because the lineages have a common ancestor are ____

a. homologous structures b. comparative structures c. analogous structures d. repetitive structures e. vestigial structures

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Acute pulmonary edema:

A) commonly results from right-sided heart failure. B) results in excess elimination of carbon dioxide. C) is characterized by progressively worsening dyspnea. D) impairs oxygen diffusion into the pulmonary capillaries

Biology & Microbiology