Which hypothesis asserts that viruses are remnants of cellular organisms and evolved from small cells that were
parasites in larger cells?
a. escape hypothesis
b. virus-first hypothesis
c. regressive hypothesis
d. progressive hypothesis
e. degenerative hypothesis
c
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What allows cephalopods to communicate with each other easily?
a. Lophophores b. Chromatophores c. Melanin d. Photophores
Transport of photosynthetically produced sugars from leaves to roots occurs by _____
a. pressure flow b. differences in source and sink solute concentrations c. the pumping force of xylem vessels d. transpiration, tension, and cohesion of water e. pressure flow and differences in source and sink solute concentrations
The name "human" is an example of a
a. common name. b. scientific name. c. binomial. d. polynomial.
Which aspect of population genetics can lead to changes in allele frequencies in a new mixed population following migration?
A) natural selection B) mutation C) gene flow D) founder effect E) bottleneck effect