Which period belongs to the Paleozoic era and not the Cenozoic era?

it would be heredity

sex cells are usually half's then they find another half and make a fertilize egg

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.

the growth of the plants is affected by the heat of the light. what is the student doing?