Red blood cells have cell membranes that allow water, oxygen, carbon dioxide and glucose to pass through. all other materials are blocked from entering. this makes the membrane
a. perforated.
b. semi-permeable.
c. non-conductive.
d. permeable.

Which statements correspond to cellular respiration? co2 diffuses passively into the cell. co2 diffuses passively out of the cell. co2 must be pumped out of the cell. o2 diffuses passively when produced inside the cell. o2 diffuses passively when converted to co2. o2 is pumped in and forces co2 out.

Whats one way that rocks do not follow the typical rock cycle pathway?

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?