Modern humans first appeared during the

a. most recent period of the cenozoic era.
b. most recent period of the mesozoic era.
c. earliest period of the cenozoic era.
d. earliest period of the mesozoic era.

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?

In what cells is the human genome located?

Why did the federal government end its support of yucca mountain as a site for long-term storage of nuclear water