Question

a population of beetles lives on light - colored sand.
trait color\t% of population (gen 1)\t% of population (gen 10)
light\t55%\t80%
dark\t45%\t20%
which trait is more fit in this environment?

Explanation:

To determine which trait is more fit, we analyze the percentage of the beetle population over generations. In Generation 1, light - colored beetles are 55% and dark - colored are 45%. In Generation 10, light - colored beetles increase to 80% while dark - colored decrease to 20%. Since the population of light - colored beetles is increasing in an environment with light - colored sand (where camouflage from predators is likely a factor), light - colored trait shows better survival and reproductive success, indicating higher fitness.

Answer:

Light - colored trait