alleryWhich factor below does not directly affect transpiration rate?
AWind speed across the leaf during the day
BTemperature of the air around the leaf
CHumidity of the air near the leaf surface
DType of fertiliser applied to the soil
Answer & Solution
Correct answer: D. Type of fertiliser applied to the soil
1. The chapter lists external factors that change transpiration rate.
2. Temperature, humidity and wind speed are all listed.
3. Fertiliser composition is a soil chemistry factor, not a direct one.
4. So option A is the factor that does not act directly.
_Source: Selina Concise Biology Class 8, Ch on Transport in Plants (Mistral OCR'd PDF), Factors Affecting Transpiration_
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