Answer:
The oxygen in inhaled air passes across the thin lining of the air sacs and into the blood vessels. This is known as diffusion. The oxygen in the blood is then carried around the body in the bloodstream, reaching every cell. When oxygen passes into the bloodstream, carbon dioxide leaves it.
Explanation:
the correct answer would be b. lower permeability
Deoxyribose+phosphate group+polymerase can be found in DNA molecule.
the brain stem controls involuntary actions such as breathing, heart beating and blinking.
Answer:
Wetlands provide a habitat for thousands of species and terrestrial plants and animals. They're also valuable for flood protection, improving water quality, and providing natural products.
Explanation:
