Tamilnadu BoardEnglish MediumSTD 11BIO BOTANYRespiration3 Marks
Question
Write down any three external factors, that affect respiration in plants.
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Answer
Three external factors, that affect respiration in plants:
1. Optimum temperature for respiration is $30^{\circ} C$. At low temperatures and very high temperatures rate of respiration decreases $\mid$
2. When sufficient amount of $O _2$ is available the rate of aerobic respiration will be optimum and anaerobic respiration is completely stopped. This is called Extinction point.
3. High concentration of $CO _2$ reduces the rate of respiration
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