Which of the following best describes the relationship between temperature and kelp productivity in the context of photosynthesis?

• A. Kelp productivity increases with temperature up to an optimal point, after which it declines due to enzyme denaturation.
• B. Kelp productivity continuously increases as temperature rises, with no upper limit.
• C. Kelp productivity is not affected by temperature changes.
• D. Kelp productivity decreases as temperature increases, regardless of the temperature range.

Answer: (A)

Verified step by step guidance

1. Understand the relationship between temperature and enzyme activity: Photosynthesis in kelp relies on enzymes, which are sensitive to temperature changes. Enzymes typically function optimally within a specific temperature range.
2. Recognize the concept of an optimal temperature: At lower temperatures, enzyme activity and photosynthesis rates are slower. As temperature increases, enzyme activity improves, leading to higher kelp productivity, up to an optimal temperature point.
3. Explain enzyme denaturation: Beyond the optimal temperature, enzymes begin to denature, losing their functional shape. This results in a decline in photosynthesis rates and kelp productivity.
4. Evaluate the options provided: Compare the descriptions in the question to the biological principles of enzyme activity and temperature effects. Identify the option that aligns with the concept of increasing productivity up to an optimal temperature, followed by a decline due to denaturation.
5. Conclude the reasoning: The correct answer is the one that describes kelp productivity increasing with temperature up to an optimal point, after which it declines due to enzyme denaturation. This matches the biological understanding of temperature's impact on photosynthesis and enzyme function.