Question

a population contains short plants and tall plants. the short plants are not able to compete with tall plants for sunlight. the tall plants, however, are more susceptible to wind damage. which type of selection will this population of plants most likely experience?

• directional selection
• disruptive selection
• species selection
• stabilizing selection

Explanation:

• Directional selection: Favors one extreme phenotype. Here, neither short nor tall is consistently favored as short can't compete for sunlight but tall is vulnerable to wind. So not directional.
• Disruptive selection: Favors both extreme phenotypes. But there's no indication that both short and tall are being favored simultaneously in a way that would lead to a bimodal distribution.
• Species selection: This is about selection acting on species - level traits (like extinction or speciation rates of different species), not relevant to within - population trait selection.
• Stabilizing selection: Favors the intermediate phenotype. Since short plants have a disadvantage (sunlight competition) and tall plants have a disadvantage (wind damage), the intermediate (a height that is not too short to get sunlight and not too tall to be wind - damaged) would be favored.

Answer:

stabilizing selection