The answer is that <span>all
veins carry blood back to the heart, except for the pulmonary vein. the
vena cava empty into the right side of the heart, so they technically
bring blood to the
</span>main atrium.
I think it is D hope it works
Stem cells are differentiated into different types of cells by a process called signaling, which leads to changes in gene activity, causing the cell to differentiate.
Answer:
breeding
Explanation:
its a term that means the same thing as reproduction
Answer:
Prophase
The replicated chromosomes thicken and become visible as separate chromosomes during prophase stage of mitosis. :)
