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.
A biologist .....they study living things only.
Answer:
Glacier
Explanation:
Glaciers erode the Earth and cause distinctive u-shaped valleys.
Answer:
<u><em>Cell Membrane (Plasma Membrane)</em></u>
The cell membrane consists of a lipid bi-layer that is semipermeable. The cell membrane regulates the transport of materials entering and exiting the cell.
Explanation:
Viruses are not cells; they are a strand of genetic material within a protective protein coat called a capsid. They infect a wide variety of organisms, including both eukaryotes and prokaryotes. Once inside the cell, they use the cell's ATP, ribosomes, enzymes, and other cellular parts to replicate.
