D. all of the above
as they are all, evergreen, short and contain flammable oils
Answer: A. Chemical signal
Explanation:
Chemical signal is the type of communication which coordinates actions between neighboring cells
.
This ability originated in single cells organisms and was essential for the evolution of multicellular organisms because after a cell receives a message, it is transferred across the plasma membrane and changes are brought about within the cell in response to this message.
The answer is B.<span>Large patches. Sorry man but some plants grow in many cracks in the asphalt.</span>
