Question

figures 1 and 2 figures 3 and 4 feathers help birds stay warm by slowing the loss of body heat to the environment. the downy section of each feather, shown in figure 1, is the section of the feather that best prevents heat loss. figure 1: downy section of a feather downy section which important biological process is most responsible for the relationships shown in figures 2 and 4? a. gene cloning b. natural selection c. cellular respiration d. chromosome repair

Explanation:

To solve this, we analyze each option:

• Option A (Gene cloning): Involves replicating genes, not related to feather adaptations for heat retention.
• Option B (Natural selection): Explains how traits (like effective downy feathers for heat retention) that enhance survival/reproduction become more common in a population over time. This fits the context of feather adaptations.
• Option C (Cellular respiration): Is about energy production in cells, irrelevant to feather structure-function relationships.
• Option D (Chromosome repair): Involves fixing DNA in chromosomes, not related to feather adaptations.

Answer:

B. Natural selection