The measure of the number of different organisms, species, and ecosystems is called:

What food can provide the body with a quick source of the energy needed to carry out cell functions (a) whole grain bread (b) ground hamburger (c) vegetable oil (d) whole milk

The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?

At which location in earth’s interior does the top density continue to increase as thickness decreases?