Answer:
A
Explanation:
since living things are made up of cells,it is not difficult to study and draw conclusion..... This has reduced much stress on scientists
Answer:
melanin
Explanation:
melanocytes produce melanin - the pigment which is ultimately responsible for your tan. The pinkish melanin travels up through the epidermis and is absorbed by other skin cells.
Answer:
concentric contraction
Explanation:
A concentric contraction causes muscles to shorten.
Explanation:
The small number behind each element symbol designates the number of atoms of each element in a chemical formula. If there is no number, it is assumed there is only one of those elements. A large number designates how many units there are of that compound.
