Which of the following best describes a heritable adaptation brought about by natural selection?
a polar bears begin to eat goose eggs as a way to survive when seals, their usual prey, are not available.
b mountain goats restrict their range to higher altitudes because of warmer low-altitude temperatures.
c snowshoe hares change their fur from white to brown to match their warm summer habitats.
d early humans learn to make tools like flint arrows and knives to them hunt more efficiently.

C. Snowshoe hares change their fur from white to brown to match their summer habitats.

Explanation:

The gene to change the fur color is passed on generation to generation, so the hares can survive in both winter and summer time.

The snowshoe hares change their fur from white to brown to match their warm summer habitats.

Explanation:

Natural selection are individuals with traits that are beneficial in the given enviroment. The perfect example would be the snowshoe hares. They can change their coats from brown to white depending on the season of year. This allows them to blend in with their enviroment and stay hidden from predators.

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: