The rate of diffusion through a semipermeable membrane will be lowest when the
a. differences in concentration on either side are the greatest.
b. temperature is raised to near boiling.
c. differences in concentration on either side are the least.
d. actions of active transport override diffusion.
e. inside is hypertonic to the outside.
C
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What does it mean to align DNA sequences?
A. Place DNA sequences such that nucleotides are in the same relative position. B. Pair all of the same nucleotides together. C. To reconstruct a piece of DNA from multiple smaller sequences. D. To generate a complement of a DNA sequence.
These are used as the basis of comparison when two samples of DNA are suspected of being from the same person.
A. fingernail samples B. restriction enzymes C. variable number tandem repeats (VNTRs) D. restriction fragments
How do phototrophic microorganisms benefit when associating with corals?
A) Calcium and carbonate ions are released, which help buffer the pH and prevent dramatic pH shifts. B) The coral skeleton is used as a source of bicarbonate for the autotrophic growth of the phototrophs. C) The coral skeleton is an extremely efficient light-gathering structure that greatly enhances light harvesting for photosynthesis. D) The water's temperature in and around the coral skeleton is much warmer.
The Hardy-Weinberg principle of genetic equilibrium tells us what to expect when a sexually
reproducing population is
a. decreasing with each generation. b. increasing with each generation. c. migrating. d. evolving. e. not evolving.