<span>Protocooperation is where two species interact with each other beneficially; they have no need to interact with each other.</span>
Answer:
a
Explanation:
both of the cases the organisms are fighting for a resource
Answer:
Some variation is the result of differences in the surroundings, or what an individual does. This is called environmental variation.
Answer:
Infectious diseases commonly spread through the direct transfer of bacteria, viruses or other germs from one person to another
Explanation: