Answer:
C- homogeneous mixture
Explanation:
its made up of multiple elements that aren't chemically combined.
you cannot see the parts of the mixture
Bio-geographic isolation is the separation of part/a whole species due to either biological or geographical reasons.
Biological could be lack of food, or a more preferable source of food somewhere else, etc. Geographical could be rivers, oceans, mountains, etc.
The producers at the beginning of the Earth's food chain are plants.
No the myelin covers bits of the cell
