It is both biotic and abiotic
To prevent blood flowing back after each heartbeat. They ensure that the blood flows only in one direction (back to the heart).
The blood group of AB because they are have both A and B glycoproteins on the surface of the cell
The ability of an organism to make a copy of itself is called Reproduction
Answer: by colors
Explanation:
A lot of Fish have certain colors to help blend in to their environment.
I hope this was helpful. :)
