The fact whether the formation of ice sheets in the temperate latitudes support the species diversification rate hypothesis or species diversification time, which resulted in latitudinal variation. Introduction: Species diversification rate is the rate, at which new species are formed and the already existing species extinct. This is also known as speciation rate. It can be measured by data from fossils, phylogenetic trees or diversity of clades and their ages. Species diversification time purposes that the amount of time over which speciation takes place in a particular region.

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Chapter 53.4, Problem 3R

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The fact whether the formation of ice sheets in the temperate latitudes support the species diversification rate hypothesis or species diversification time, which resulted in latitudinal variation.

Introduction:

Species diversification rate is the rate, at which new species are formed and the already existing species extinct. This is also known as speciation rate. It can be measured by data from fossils, phylogenetic trees or diversity of clades and their ages. Species diversification time purposes that the amount of time over which speciation takes place in a particular region.

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can you help? I think its B but not sure