Why is it impossible for carnivores to eat plants?

According to the theory of punctuated equilibrium, at what rate does speciation occur? species change depending on the rate of natural selection. after periods of stasis, new species evolve relatively rapidly. species change slowly and eventually form new species. some species change quickly and others change slowly to balance the overall rate.

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

How does human environment effect the biosphere