The barnacles are only able to attach them selfs to surfaces in the water. Since the surface is limited, barnacles are attaching themselves to the other barnacles, crowding the rock. The muscles were not able to grow or attach themselves off the surface of the rock. Same thing with the mussels that are growing on the rock. So not only barnacles are crowding the rock, but Mussels as well are crowding the rock.
Traits are determined by genes
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Answer:
The cancer alters there DNA in the tissue thus causing it to get infected. If it does not get treated and it spreads you will die
Explanation:
