The rate of photosynthesis first increases with temperature. This is because as temperature rises, the rate of metabolic reactions, including photosynthesis, also increases due to the increased kinetic energy of the molecules involved.

However, after reaching an optimum temperature (usually around 25-30°C for most plants), the rate of photosynthesis starts to decrease. This is because the enzymes that catalyze the reactions in photosynthesis start to denature, or lose their shape, at high temperatures, which decreases their activity.

In addition, high temperatures can cause the stomata (small openings in the leaf surface) to close to prevent water loss. This reduces the availability of carbon dioxide, a key reactant in photosynthesis, further reducing the rate of photosynthesis.

So, the correct answer is: The rate of photosynthesis first increases then decreases again with temperature.

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The rate of photosynthesis first increases with temperature. This is because as temperature rises, the rate of metabolic reactions, including photosynthesis, also increases due to the increased kinetic energy of the molecules involved.

However, after reaching an optimum temperature (usually around 25-30°C for most plants), the rate of photosynthesis starts to decrease. This is because the enzymes that catalyze the reactions in photosynthesis start to denature, or lose their shape, at high temperatures, which decreases their activity.

In addition, high temperatures can cause the stomata (small openings in the leaf surface) to close to prevent water loss. This reduces the availability of carbon dioxide, a key reactant in photosynthesis, further reducing the rate of photosynthesis.

So, the correct answer is: The rate of photosynthesis first increases then decreases again with temperature.

Knowee AI · Accepted Answer

The rate of photosynthesis first increases with temperature. This is because as temperature rises, the rate of metabolic reactions, including photosynthesis, also increases due to the increased kinetic energy of the molecules involved.

However, after reaching an optimum temperature (usually around 25-30°C for most plants), the rate of photosynthesis starts to decrease. This is because the enzymes that catalyze the reactions in photosynthesis start to denature, or lose their shape, at high temperatures, which decreases their activity.

In addition, high temperatures can cause the stomata (small openings in the leaf surface) to close to prevent water loss. This reduces the availability of carbon dioxide, a key reactant in photosynthesis, further reducing the rate of photosynthesis.

So, the correct answer is: The rate of photosynthesis first increases then decreases again with temperature.

As temperature increases, the rate of photosynthesisIncreasesDecreasesFirst increases then decreases againRemains the same

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