Question

a student conducted an experiment to explore how light levels affect indoor houseplant growth. she grew many identical houseplant seedlings under three different light levels - low, medium, and high - for 8 weeks, making sure to keep all other growing conditions the same. afterward, she measured the height and leaf area of each plant and calculated averages for the different light conditions. she concluded that low light levels caused plants to invest more in leaf size than in vertical growth, while high light levels caused plants to invest more in vertical growth than in leaf size. which choice best describes data in the table that support the students conclusion? choose 1 answer: a plants grown in high light had the tallest average height, while plants grown in low light had the shortest average height. b plants grown in low light had the largest average leaf area and the shortest average height, while plants grown in high light had the tallest average height and the smallest average leaf area. c plants grown in medium light had the smallest average leaf area and the smallest average height, while plants grown in low light had the largest average leaf area and the tallest average height. d plants grown in high light had the smallest average leaf size, while plants grown in low light had the largest average leaf size.

Explanation:

The student's conclusion is that low light levels cause plants to invest more in leaf size than vertical growth, and high light levels cause plants to invest more in vertical growth than leaf size. So we need data that shows low - light plants have large leaf area and small height, and high - light plants have large height and small leaf area.

• Option A only compares height between high - light and low - light plants, not considering leaf area.
• Option B only mentions height and leaf area for low - light plants, not high - light plants.
• Option C is about medium - light plants, which is not relevant to the conclusion.
• Option D correctly states that low - light plants have the largest average leaf size (invest in leaf size) and high - light plants have the smallest average leaf size (don't invest in leaf size), while also implying a comparison of height (since it's about the relationship between light level, leaf size and height as per the conclusion).

Answer:

D. Plants grown in high light had the smallest average leaf size, while plants grown in low light had the largest average leaf size.