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.