The evolution of development of snout-length in cichlid fish is best explained by
A. a single gene mutation.
B. the modification of an existing gene for a new function.
C. homoplastic convergence.
D. gene duplication and divergence.
E. conserved genes.
A. a single gene mutation.
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In which ponds did male guppies have the lowest mean number of spots?
a. ponds with no predators b. ponds with cichlids only c. ponds with killifish only d. ponds with cichlids and killifish
Which is NOT an example of the climate of
North America?
a. yearly rainfall b. yearly wind speed and directions c. average temperature over the year d. average temperature during the month of June e. the temperature taken at noon on a Friday in December
Which classification level would contain the greatest number of species?
a. class b. division or phylum c. domain d. family e. order
Who performed experiments discrediting spontaneous generation?
Eduard Buchner Robert Koch Francesco Redi Louis Pasteur