That you can have the child your self in stead of having someone else do it for you
Answer:
mutualism
Explanation:
It's a symbiotic relationship beneficial to both symbionts.
in this case E. Coli helps with the absorption of Vitamin K and other important vitamins for the human body in the colon. While, Human (host) provides shelter for it
I believe it is Primates.
Answer:
between 20,000 and 25,000