Suppose you were analyzing the bodies of two ancient humans who were known to have lived at the same time. You find that
one of the bodies has a slightly greater amount of carbon-14
still remaining in it than the other.

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

List the advantages and disadavantages of the switch from persistent chlorinated hydrocarbon pesticides (such as ddt) to nonpersistent organophosphate pesicides. have the benefits of the switch outweighed the disadvantages? explain.

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.