The answer is A
If carbon dioxide increased in the atmosphere the surface of the earth would intake more energy
Explanation:
In Cretaceous Period,fish mammals,reptiles,amphibians,and plants appeared on the earth.
Answer: the contractile vacuole
Explanation: The contractile vacuole is a star-like structure located toward the cell's posterior. This organelle aids the cell in the removal of excess water. Without it, the euglena would be able to absorb so much water through osmosis that the cell would burst.
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With out the salt the vein would take in too much water and burst.
A; information in the DNA of the nucleus can tell skin cells how to develop and perform special functions, which cause a group of these cells to perform similar functions and become skin
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