Is a quantitative estimate of the total mass, or amount, of living material.

Hey me with this one❤☺❤ how do you say that a cell also has a life span and death like an organism? give one example.

What is thought to have caused the mass extinction at the end of the cretaceous period?

Twin boys have girlfriends one of the couples have a baby would the dna of the lil baby be the same as the couples dna bc the boys are identical twins