Carol and joseph have freckles and curly red hair. all of their children, except one, also have freckles and curly red hair. their son, sam, has the same curly red hair but not one freckle! how can a child get a chromosome that is totally different from the original chromosomes of both parents?
a. gene flow
b. genetic drift
c. crossing over
d. natural selection

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

Which label correctly identifies what x represents in the concept map?

Explain the process that creates the heat of the sun?