Question

Fdsci 101 what general trend do you observe relative to the masses of these species? question 3 options: all species basically have the same mass. later species are less massive than earlier species. later species are more massive than earlier species. there seems to be no trend at all!

Answer 1

The third and last option is correct.

Species in the past (referring to dinosaurs) were more massive.

$\bf~CO_{2}$ levels where higher in the past, which meant that plants prospered during that time since they had a easy access to food. That contributes to the fact that herbivores could grow bigger because there was more food. Which in turn, increases the size of early carnivores which eat bigger herbivores.

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