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).

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.

the correct answer in apex is tissue development, i know because i just had this question