Which below is an adaptation that favors the survival of an organism?

a. proteins expressing color in butterfly wings mutate to improve camouflaging abilities of butterflies

b. lengths of beaks in a bird population increase to the point birds can no longer groom themselves

c. a ground squirrel population in the forest develops webbed feet for swimming

d. a desert coyote population loses the ability to cope with low water conditions

Ans. (A). Proteins expressing color in butterfly wings mutate to improve camouflaging abilities of butterflies.

Adaptation is described as permanent change in organism due to mutation that leads to better survival of that organism.  

Camouflage helps the butterfly to hide in its surrounding environment to avoid predators. So, if a mutation leads to expression of protein in butterfly's wings that improve camouflage in butterfly will show an adaptation as would lead to increased survival of that butterfly population.

Thus, the correct answer is option (A).

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy

maybe because its impossible for balloons to lift a whole entire house.