Question

page 11 of 11 High Altitude Living Quick Check 5 of 55 of 5 Items Question An enlarged right ventricle both increases oxygen intake and the risk of pulmonary hypertension. How can natural selection result in an adaption that produces both positive and negative effects?(1 point) Responses The negative effects appear later in life in certain environments. The negative effects appear later in life in certain environments. The positive effects appear after reproductive age in certain environments. The positive effects appear after reproductive age in certain environments. The positive effects outweigh the negative effects in certain environments. The positive effects outweigh the negative effects in certain environments. The negative effects appear before reproductive age in certain environments. The negative effects appear before reproductive age in certain environments. Skip to navigation

Answer 1

Natural selection can drive adaptations that have both positive and negative effects depending on the environment and life history of an organism. In the case of an enlarged right ventricle, the positive effects (such as increased oxygen intake) may provide a significant advantage in high-altitude living, where oxygen levels are lower.

If the negative effects (like the risk of pulmonary hypertension) manifest later in life or after reproductive age, they may have little impact on the individual's ability to reproduce and pass on their genes. In this context, the positive effects may outweigh the negative effects, leading to a net advantage for the trait in specific environments.

Therefore, the best response to the question would be: **"The positive effects outweigh the negative effects in certain environments."**