Question

two populations of wild hogs live on a similar crop farm that produces large amounts of crops for the local farmers markets and grocery stores. one population lives near a landfill, and the other resides near a rain forest. which of these genes would be expected to vary the most between the two populations?

• a gene involved photosynthesis
• a gene involved in detoxification of chemicals and toxins
• a gene involved in temperature regulation
• a gene involved in water balance

Explanation:

Wild hogs near a landfill are exposed to more chemicals/toxins than those near a rainforest. Genes for detoxification would face stronger selective pressure in the landfill population, leading to greater variation between the two groups. Photosynthesis is irrelevant (hogs are animals), temperature/water balance differences between the two habitats are less distinct than toxin exposure.

Answer:

a gene involved in detoxification of chemicals and toxins