At the end of which period did nearly three quarters of all species of life on earth go extinct in a very short time interval

Cambrian

jurassic

triassic

cretaceous

Most psychologists believe that development, like intelligence or personality, reflects the action and mutual influence of genes and environment. The most important question concerning nature and nurture is:

What is a way a cell is put together called?

Which is an example of condominace

In the Galapagos islands, the weather causes a variation in algae growth year to year. Marine iguanas eat the algae, and during the years with more algae growth, the marine iguanas lay more eggs.

Deer, squirrels, trees and flowers all live in the forest together. When animals and plants live together in a certain area, it is known as none of these coexistence parasitism predation

Scientific notation for 0.000468

Aquaporins are proteins that control the passage of water molecules across a cell membrane. The protein forms a pore, or opening, in the membrane.

I have moist skin but no scales, and two pairs of legs. Although I have lungs and live on land, my young usually live in water and use gills to breathe.

Why is wind, like force, considered a vector quantity?

When did darwin arrive on the galapagos islands