Answer:
I think it explains that the DNA molecules are double helix with alenine and thymine paired together
Photosynthesis is the answer
The cell wall contains not only cellulose and protein, but other polysaccharides as well. The cell wall provides structural support and protection. Pores in the cell wall allow water and nutrients to move into and out of the cell. The cell wall also prevents the plant cell from bursting when water enters the cell.
The muscles moved quickly to defend themselves against this new predator by thickening their shells
