To prevent blood flowing back after each heartbeat. They ensure that the blood flows only in one direction (back to the heart).
Centromeres split apart during anaphase.
spindle fibers pull the to sister chromatids apart.
Answer:
Oxygen is reduced, gaining electrons and hydrogen ions. -second choice
Answer:
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom
Explanation:
Answer:
B: Polyermase Chain Reaction
Explanation:
PCR is when we take a segment of DNA and multiply it! We can see that the number of DNA segments are increasing therefore it is PCR. Hope this helps!
