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.

Biology & Microbiology

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Who performed experiments discrediting spontaneous generation?

Eduard Buchner Robert Koch Francesco Redi Louis Pasteur

Biology & Microbiology