C. The presence of predators could cause natural selection because it would mean survival of the fittest.
Answer:
8
Explanation:
There are originally 8 but 4 of them are the most common known ones.
I hope it helps! Have a great day!
Muffins ^^
Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body. Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation. Arteries and veins are two of the body's main type of blood vessels.
The mechanics of cytokinesis are not yet completely understood, but a great deal is known about the critical timing of its events and other aspects of the final step in the cycle of any one cell. The four stages of cytokinesis are initiation, contraction, membrane insertion and completion .
