<u>D.) Crossing over</u> is a source of genetic variation that involves the swapping of sections of chromosomes during meiosis.
Answer: The stimulus would be someone running in the heat and the external response would be them sweating .
Answer:
In summary, to meet the status of a scientific theory, the theory must be falsifiable or testable.
This is called a food web, where many food chains are combined to form a more detailed version showing feeding relationships within an entire community
