They are distinguished by proteins on the erythrocytes.
Answer:
the answer is b.
Explanation:
The inside of bone is called marrow, which is responsible for creating blood cells, vital to homeostasis. obviously, bone gives us support, and shape.
so, out of the choices, the answer is b.
Convection drives the circulation of air in the earth's atmosphere.
Answer:
False
Explanation:
The papillary muscles of both right and left ventricles began to contract shortly before the other ventricular muscles (systole) so that they can take up the slack on the chordae tendineae as the full force of ventricular contractions sends blood against the atrioventricular (AV) valve flaps.
They prevent the backward flow of blood to atria from ventricles. So if they contract after the ventricle systole they would not be able to perform their job.
The answer to this one is Photosynthesis <span />
