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
Answer:
b im pretty sure
Explanation:
Population density is the average number of individuals in a population per unit of area or volume. For example, a population of 100 insects that live in an area of 100 square meters has a density of 1 insect per square meter.
Answer: A. before history was written.
Explanation:
I'm not sure if you need an explanation, but prehistoric means "very old or out of date." Hope this helps, Good luck! :)
Trait is an obvious, observable, and measurable trait; it is the expression of genes in an observable way. An example of a phenotypic trait is a specific hair color
