Which statement is correct with respect to gross primary productivity?
A.
It is the total amount of energy produced by plants.
B.
It is the amount of energy used by plants for respiration.
C.
It is the amount of carbon dioxide that the plants release.

allowed for the prediction of the properties of missing elements.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.