What is the purpose of the cell wall?
It keeps the cell from drying out.
It gives the cell a green color.
It supports and protects the cell.
It gives the cell a flexible structure.

Dna is always read in the whereas rna is read in .

When a human or animal consumes food, the carbon in that food is most likely to be converted into which of the following elements? a. carbon remains carbon b. nitrogen c. oxygen d. hydrogen

9. the history of life on earth is recorded in