Two species of tree frogs that live sympatrically in the northeastern United States differ in ploidy: Hyla chrysoscelis is diploid, and Hyla versicolor is tetraploid
The frogs are identical in appearance, but their mating calls, which females use to find mates, differ. Which difference most likely evolved first? A) polyploidy
B) difference in mating calls
C) Polyploidy and different mating calls must have evolved at the same time.
A
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If two solutions have unequal concentrations of a solute, the solution with the lower concentration is called
A. isotonic. B. hypertonic. C. hypotonic. D. osmosis.
Viruses defy characterization as living organisms even though they possess nucleic acids and proteins. The reason why viruses are not considered to be alive is because they
A. form spontaneously.material. B. cannot form spontaneously. C. cannot reproduce without a host cell. D. lack genetic Viruses defy characterization as living organisms even though they possess nucleic acids and proteins. The reason why viruses are not considered to be alive is because they
Ornithologists visiting an island find two species of birds that appear nearly identical except for bill size. Which of the following is the most likely explanation for their discovery?
A) The birds need camouflage for protection from predators. B) Coevolution of the two species has resulted in resource partitioning between the species. C) They are not separate species. D) There is natural random variability. E) Mutations have resulted in an inferior species with defective bills.
Which is mismatched?
A. plasmids - genes essential for growth and metabolism B. cytoplasm - dense, gelatinous solution C. ribosomes - protein synthesis D. inclusions - excess cell nutrients and materials E. nucleoid - hereditary material