Answer:
I think humans and whales are closely related on the evolutionary tree because they are both mammals and both have endoskeleton
Answer: A specific chemical binding to nociceptors
Explanation:
Answer:
adding a catalyst
Explanation:
catalysts accelerate the speed of chemical reactions
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
