Question

Which best illustrates a result of natural selection?
a bat that is born with a wing that is missing the web
dark-colored hares living in a snowy area
mosquitoes that transmit disease to humans
giraffes having increasingly longer necks over time

Answer 1

I think the giraffe one

Answer 2

Natural selection is a species physically changing over time to adapt to the environment.

Answer 3

Definately D
What happens is throughout the years, a mutation occured that made one giraffe have a longer neck. Because of this advantage, he could eat food that was higher that is not available to others, live successfully and reproduce.

Then, his children would have this gene, and also have this ability. They can eat what others can't and reproduce. Others who can't eat will have nothign to eat, and die off. Eventually, they the proportion of giraffes becomes more long neck, since they survived and small necks died off. This is evolution