Select all the correct answers.

Question

Review the graph. What can you conclude about the rate of photosynthesis and respiration in a plant?

Graph with X-axis as Time of Days (hours), Y-axis as Glucose Balance (grams per hour). Rate of photosynthesis Parabola between 8 and 17 on X-axis, vertex at (12, 0). Rate of plant respiration curved dashed line intersects parabola (10, 0), (15, 0).

Plants can’t photosynthesize at night.
Photosynthesis peaks at sunrise.
Plants need ATP production for the entire day.
Photosynthesis begins as soon as respiration starts.

Answer 1

Based on your description of the graph, here are the conclusions regarding the rate of photosynthesis and respiration in a plant:

1. Plants can’t photosynthesize at night. - This is correct. Since photosynthesis relies on sunlight, it does not occur at night.

2. Photosynthesis peaks at sunrise. - This statement is incorrect. The vertex of the parabola (indicating the peak of photosynthesis) is at noon (12:00), not at sunrise.

3. Plants need ATP production for the entire day. - This statement can be considered correct. Plants require ATP for various metabolic processes throughout the day and night, including respiration.

4. Photosynthesis begins as soon as respiration starts. - This statement may not accurately reflect the graph as it suggests that both processes occur simultaneously right from the start. Photosynthesis has a specific time frame during daylight hours and may begin after sunlight is available, while respiration occurs continuously.

Based on this analysis, the correct answers are:

• Plants can’t photosynthesize at night.
• Plants need ATP production for the entire day.