Question

decide which examples are most likely to increase variation or decrease variation. some examples could do both. which of the following could possibly increase genetic variation indirectly? □ toxins □ predator - prey relationships □ competition □ new habitat □ disasters □ increased food supply done

Explanation:

• Toxins: Can cause mutations (direct genetic change) or kill less resistant individuals, reducing variation directly.
• Predator-prey relationships: Predators often target common phenotypes, favoring rare traits indirectly, which can increase genetic variation over time.
• Competition: Typically favors dominant, well-adapted genotypes, reducing variation.
• New habitat: Creates new selection pressures that may favor previously rare genetic traits, indirectly increasing variation as those traits become more common.
• Disasters: Cause bottleneck effects, drastically reducing genetic variation.
• Increased food supply: Reduces selection pressure, allowing more genotypes to survive, which can indirectly maintain or increase variation by not eliminating less fit traits.

Answer:

• predator-prey relationships
• new habitat
• increased food supply