Answer:
A
Explanation:
insulin is released from pancreas when blood sugar level rises
Sister chromatids first appear during the S phase of the cell cycle.
I think b surface fronts but im not 100% sure
Answer:
pollination
Explanation:
this is the obvious answer because pollen and **pollen**ation
Answer: FROM THE PULMONARY VEIN
Explanation: oxygen poor blood from the right ventricle into the lungs, where the oxygen enters the bloodstream. The pulmonary veins bring oxygen rich blood to the left atrium.