Because when your about to swallow food air rapidly comes in your mouth and when you digest the hit air rises up and out your mouth
Assuming the white phenotype is recessive. white: gg
I think the gray mouse is Gg because the offspring were pretty equally distributed in terms of color. See the punnet square below.
g g
G| Gg Gg
g| gg gg
If the Gray phenotype is recessive, then gray: ww but only if white is Ww because its about 50% chance for both.
The answer is b. to maintain the functions of the reproductive organs
Vitamin C is a water soluble vitamin that has a role in connective tissue. It produce and maintain collagen and has a role in wound healing. It also increase the iron absorption which makes orange juice a good drink for a meal with meat. Vitamin C will also protect and recycle vitamin e.
C. The area once had a warmer climate
Because the others are false:
A. A forest covered in snow will not result in fossilsed ferns as fossilization required vast periods of time
B. ^^
D. There isn't enough evidence provided in this question to support that prehistoric humans ate ancient ferns