Answer:
When cells communicate by the signaling process, one cell produces a <u><em>signaling molecule</em></u> that must be received by the <u><em>signal receptor </em></u>on or in the responding cell.
The answer is A. Hope this helps!
Explanation:
All great elements
C
PLZ MARK ME AS BRAINLIEST
POTENTIAL SOURCES OF MEDICINES ARE LOST WHEN BIODIVERSITY DECLINES IS CORRECT because biodiversity provides us a lot of medicines
hope it will help you