Which domain(s) have densely packed genomes with little noncoding space?

a. Archaea only
b. Bacteria only
c. Eukarya only
d. Archaea and Eukarya
e. Bacteria and Archaea


ANSWER: e

Biology & Microbiology

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A Pasteur flask has a(n)

A) swan neck to prevent particulate matter from getting into the main body of the flask. B) double neck so two substances may be added at the same time. C) secondary opening at the base to allow for drainage. D) inverted upper edge to prevent spillage while swirling.

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Cone cells most likely evolved from:

A. rhodopsin B. retinal C. rod cells D. ommatidia

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The sightless eyes of animals that live in dark caves is an example of what kind of structure?

a. analogous structure b. vestigial structure c. homologous structure d. convergent structure

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Many of the color varieties of summer squash are determined by several interacting loci: AA or Aa gives white, aaBB or aaBb gives yellow, and aabb produces green. Crosses among heterozygotes give a 12:3:1 ratio

What type of gene interaction would account for these results?

Biology & Microbiology