Answer:
The gravitational force on an object increases as the object’s mass increases.
Explanation:
Answer:
Animals are classified as being multicellular whereas protozoans are microscopic single-celled organisms.
Explanation:
Answer:
During exercise, your heart typically beats faster so that more blood gets out to your body. Your heart can also increase its stroke volume by pumping more forcefully or increasing the amount of blood that fills the left ventricle before it pumps.
Explanation:
because it is a new virus that us humans have not experienced and we are still learning about it
The difference between an artery and a vein is that arteries are larger, more muscular and more elastic than veins; they carry blood that is under pressure from having been pumped out of the heart; veins are under much less pressure, so they are not as strong
