Answer:
interaction between two different organisms living in close physical association, typically to the advantage of both.Compare with antibiosis.
a mutually beneficial relationship between different people or groups.
Explanation:
The portion of Earth’s history during which tectonic forces acted on Earth’s surface.
Answer:
The experiment will be faulty
Explanation:
To set up a control group, you pick individuals at random( so you don't just get a group to be of the same character, or opinion).
The control group is vital in every experiment because, sometimes our hypothesis could be mere coincidence or assumptions. So the control group will be compared to the test group to see if the results are correct. Plus look at it this way, without a control group, your hypothesis wouldn't be a theory.
