Usually the place with the most stable community
(ex: Tall growing trees, plants that live a long time)
Natural selection acts directly on those gene variations for traits or phenotypes.
The phenotype of an organism is the physical characteristic and is determined by the organism's genotype. Natural selection selects the genes that produce a certain phenotype by providing suitable conditions for a certain phenotype.
8) is b.
im not sure if this is right though
18) is d
Answer:
tundra plants, caribou and grizzly bear, and lichens.
Explanation:
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.
