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

Explanation:

Natural selection is the process where traits that improve survival and reproduction become more common in a population over generations.

• A bat with a missing wing web is a random mutation, not a result of selection.
• Dark hares in a snowy area are poorly adapted and would be selected against, not a result of successful natural selection.
• Mosquitoes transmitting disease is a trait related to their feeding, not a trait shaped by selection to improve their survival/reproduction in a way that becomes more common over time.
• Giraffes with longer necks could reach more food, survived better, reproduced more, so the trait became prevalent over generations, which is a classic example of natural selection.

Answer:

giraffes having increasingly longer necks over time