What are microscopic blood vessels that connect arteries and veins?

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.

Apart of an ecosystem that can restrict the growth of a population is referred to as

Which enzymes break down carbohydrates?