While observing through his microscope, Hooke saw tiny boxlike cavities, which he illustrated and described as cells. He had discovered plant cells. Hookes discovery led to the understanding of cells as the smallest units of life—the foundation of cell theory
Answer:
The answer is D.
Explanation:
It occurs continuously in the cells of all organisms and often involves an exchange of gases. There are 2 types of cells, 1 is Eukaryotic, which holds a nucleus, and the 2nd is Prokaryotic, which do not. Prokaryotes are single-celled organisms.
There are different materials of raw water, but also the raw water comes from ponds,rivers, and oceans but they might be good sometimes, and gas not been treated and has bacteria or mold buy that is not good.
