All of the following are threat to biodiversity Except,
A. Biological magnification of toxic compounds
B. Habitat fragmentation
C. Invasive species
D. Species preservation
E. habitat preservation
Answer: E. habitat preservation
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The production of second messengers in signal transduction offers at least two advantages, speed and
A. specificity. B. amplification. C. one-to-one stoichiometry. D. reversibility. E. affinity.
The tympanum and stapes are used in tetrapods for
a. seeing. b. hearing. c. heat-sensing. d. tasting. e. smelling.
An individual with the genotype AaBbCC will produce gametes with which possible assortment of genes?
A) A,B,a,b, or C B) Aa, Bb, or Cc C) ABC, AbC, aBC, or abC D) AaBbCC
After mixing a heat-killed, phosphorescent (light-emitting) strain of bacteria with a living, nonphosphorescent strain, you discover that some of the living cells are now phosphorescent
Which observation(s) would provide the best evidence that the ability to phosphoresce is a heritable trait? A) evidence that DNA was passed from the heat-killed strain to the living strain B) evidence that protein passed from the heat-killed strain to the living strain C) especially bright phosphorescence in the living strain D) phosphorescence in descendants of the living cells