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.

well we can't tell you because we cant see the time give a screen shot or something.

it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).