Answer: B. Only when the ball rolls from Position 3 to Position 5.
Explanation:
Answer: Cells typically receive signals in chemical form via various signaling molecules. When a signaling molecule joins with an appropriate receptor on a cell surface, this binding triggers a chain of events that not only carries the signal to the cell interior, but amplifies it as well.
Explanation:
Answer:
Population
Explanation:
population- all the members of one species in a particular area.