What is one essential amino acid which cats cannot produce but dogs can?

Contrast how pollination is different among gymnosperms and angiosperms.

The image shows the evolution of a species of fish. a few fish from a population developed different social behaviors and evolved into different species. two fish according to the image, the fish underwent . the new species of fish had mating seasons that were different from that of the original fish. because of the differences in mating seasons, the fish underwent reproductive isolation. this mode of isolation would be .

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000