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 snow area
○ mosquitoes that transmit disease to humans
○ giraffes having increasingly longer necks over time

Explanation:

To determine the result of natural selection, we analyze each option:

• A bat with a missing wing web is a mutation, not a result of natural selection favoring a trait over time.
• Dark - colored hares in a snowy area would be at a disadvantage (easier to be preyed on), so this is not a result of natural selection.
• Mosquitoes transmitting disease is a characteristic of their biology, not a result of natural selection acting on a trait to increase its prevalence over time.
• Giraffes with increasingly longer necks over time is a classic example of natural selection: giraffes with longer necks could reach more food (leaves on tall trees), survived better, and passed on the long - neck trait, leading to the trait becoming more common over generations.

Answer:

giraffes having increasingly longer necks over time