Answer:
nucleus
Explanation:
the nucleus is essentially the brain of the cell
Answer: Epithelial tissue is the internal and external lining of the surfaces of organs. Connective tissue connects tissues and organs.
Explanation: Good Luck!
Natural selection is the process where organisms that are best suited to their environment survive and pass on their genetic traits in increasing number to successive generations. At the same time, organisms that are less adapted fail to survive or multiply at a lower rate, and tend to be eliminated from the ecosystem.
They are all made up of 4 nitrogen bases...
Thymine
Gaunine
Cytosine
Adenine