Let's analyze each of the scenarios you presented regarding their effects on the amount of further synthesis (which I assume refers to primary production of organic matter via photosynthesis) and how they might influence photosynthetic activity in plants like Elodea.
A. Increase in the number of Elodea plants in the jar:
- Effect on Photosynthesis: Increased number of plants generally leads to an increase in total photosynthetic activity because there are more leaves available to capture light and perform photosynthesis.
- Conclusion: Photosynthesis increased
B. Using a light source with a weaker bulb:
- Effect on Photosynthesis: A weaker light source would provide less light energy for the photosynthetic process, which could lead to a decrease in the rate of photosynthesis.
- Conclusion: Photosynthesis decreased
C. Using some water instead of baking soda solution:
- Effect on Photosynthesis: Baking soda (sodium bicarbonate) provides a source of carbon dioxide (CO2) to the water for photosynthesis. If only water is used, the plants may not have enough CO2 available, leading to lower rates of photosynthesis.
- Conclusion: Photosynthesis decreased
D. Increase the amount of baking soda in both investigations:
- Effect on Photosynthesis: Increasing the amount of baking soda would provide more CO2 for the plants, enhancing the potential for photosynthesis, assuming other conditions (like light and nutrients) are adequate.
- Conclusion: Photosynthesis increased
Summary:
- A: Photosynthesis increased
- B: Photosynthesis decreased
- C: Photosynthesis decreased
- D: Photosynthesis increased
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