Use this information for the question below. Many fossils have been found showing that the horse evolved from a small browsing animal to a large grazing plains dweller (the modern horse), but the fossil record does not show all the intermediate forms.
-The punctuated equilibrium model says that these gaps are due to:
A) geological catastrophes.
B) the improbability of fossilization.
C) climate change.
D) sudden genetic change, so that intermediate forms existed for a short time and thus are unlikely to be found as fossils.

Question

Quizplus · Accepted Answer

The punctuated equilibrium model explains the gaps in the fossil record by suggesting that evolutionary changes occur in rapid bursts, followed by long periods of stability. This means intermediate forms would have existed for relatively short periods, making them less likely to be fossilized and found.

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