Which type of cell has the fewest number of chromosomes?
a. somatic
b. gametes
c. archaea
d. diploid
c. archaea
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Which of the following features of transcription initiation is least likely to contribute to the process of "abortive initiation"?
A. Early in initiation, the RNA exit channel of RNA polymerase is blocked by the polymerase itself. B. Early in initiation, the RNA exit channel of RNA polymerase is blocked by the sigma factor. C. The transition between the closed and open complex is energetically costly. D. RNA is synthesized de novo, requiring no primer. E. Early in initiation, the processivity of RNA polymerase is low.
Which of the following kinds of animals are NOT crustaceans?
A. krill B. barnacles C. ostracods D. pill bugs E. scorpions
The concept of ____, the view that slow and continuous physical processes, acting over long periods of time,produced
Earth’s major geological features, was proposed by ____.
a. gradualism; James Hutton b. natural selection; Charles Darwin c. catastrophism; Georges Cuvier d. natural theology; Nicolaus Copernicus e. uniformitarianism; Thomas Huxley
Members of the ____ lineage,including octopuses, squids, and nautiluses, have a fused head-foot body with the "foot"
modified into a set of arms and tentacles.
a. Cephalopoda b. Polyplacophora c. Platyhelminthes d. Gastropoda e. Scaphopoda