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Biology, 11.10.2019 08:00 georgesk872

Ascientist is studying the fossil record to construct an evolutionary lineage for an order of fishes. the scientist proposes that the lineage involves long periods of little change to species and then brief periods of significant changes. is the scientist’s proposal consistent with modern evolutionary theory?

a) yes, the scientist is describing a pattern of punctuated equilibrium
b) yes, but only if the brief periods of significant changes occurred after mass extinctions.
c) no, species evolve only gradually and at a relatively constant rate of change.
d) no, species evolve only gradually, although the rate of change may vary among evolutionary lineages.

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