n an experiment two potted plants, labeled Plant 1 and Plant 2, are placed in transparent plastic bags and left in the open. Sodium hydrogen carbonate is added to the bag covering Plant 1. This compound decomposes slowly to produce carbon dioxide. Soda lime is added to the bag covering Plant 2. This compound absorbs carbon dioxide. Both plants are watered regularly with the same amount of water. After several days, starch test results indicate starch in leaf 1 but an absence of starch in leaf 2.
This experimental data confirms the
Responses
A role of water in photosynthesis.role of water in photosynthesis.
B role of sunlight in photosynthesis.role of sunlight in photosynthesis.
C role of nutrients in photosynthesis.role of nutrients in photosynthesis.
D role of carbon dioxide in photosynthesi
s.role of carbon dioxide in photosynthesis.
The experimental data suggests that the presence of carbon dioxide (CO2) is necessary for photosynthesis to occur. By adding sodium hydrogen carbonate to the bag covering Plant 1, carbon dioxide is released, providing the necessary CO2 for photosynthesis. In contrast, by adding soda lime to the bag covering Plant 2, the carbon dioxide is absorbed, depriving Plant 2 of the CO2 needed for photosynthesis.
After several days, when the starch test is performed, starch is found in leaf 1 indicating that photosynthesis has occurred and glucose (produced by photosynthesis) has been converted to starch for storage. On the other hand, there is an absence of starch in leaf 2, suggesting that without carbon dioxide, Plant 2 was unable to perform photosynthesis and produce glucose.
Therefore, the experimental data confirms the role of carbon dioxide in photosynthesis. The correct answer is D: role of carbon dioxide in photosynthesis.
s.
Step 1: Read the experimental data: Plant 1 (with sodium hydrogen carbonate) showed starch in leaf 1, while Plant 2 (with soda lime) showed an absence of starch in leaf 2.
Step 2: Analyze the experimental setup: The purpose of adding sodium hydrogen carbonate to Plant 1 is to provide a source of carbon dioxide, while soda lime is added to Plant 2 to absorb carbon dioxide.
Step 3: Interpret the results: The presence of starch in leaf 1 of Plant 1 indicates that it has performed photosynthesis, as starch is a product of photosynthesis. The absence of starch in leaf 2 of Plant 2 suggests that it was unable to perform photosynthesis.
Step 4: Relate the results to photosynthesis: Photosynthesis is the process by which plants convert carbon dioxide, water, and sunlight into glucose and oxygen. The starch test is an indicator of glucose production.
Step 5: Determine the role of carbon dioxide in photosynthesis: Carbon dioxide is one of the key reactants required for photosynthesis. It is used by the plant along with water and sunlight to produce glucose and oxygen.
Step 6: Answer the question: Based on the experimental data, the absence of starch in leaf 2 of Plant 2 indicates a lack of carbon dioxide. Therefore, the experimental data confirms the role of carbon dioxide in photosynthesis.
Answer: D) role of carbon dioxide in photosynthesis.