Prokaryotes that require high salt concentrations would be classified as

A. archaeans.
B. bacteria.
C. thermoacidophiles.
D. viruses.
E. cyanobacteria.


Answer: A

Biology & Microbiology

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True or false: When two populations have undergone allopatric speciation long enough to be unable to produce fertile offspring, then they are different enough to be considered two different species

A. true B. false

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Which animal has the least advanced nerve cord?

a. chordate b. arthropod c. flatworm d. human e. octopus

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Refer to the accompanying figure with the lateral line organs of fishes. The structures indicated by label 1 are:


a. hair cells.
b. cupula.
c. stereocilia.
d. sensory neurons.
e. supporting cells.

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Including the membrane of the surrounding vesicle, how many phospholipid (NOT lipopolysaccharide) bilayers should be found around each P. chromatophora's chromatophore, and which one of these bilayers should have photosystems embedded in it?

A) two; innermost B) two; outermost C) three; innermost D) three; outermost

Biology & Microbiology