The process of water evaporation from the leaves that creates a pulling force for water ascent is: MCQ with Answer and Explanation

The process of water evaporation from the leaves that creates a pulling force for water ascent is:
A. Guttation
B. Root pressure
C. Capillary action
D. Transpiration
Answer: Option D
Solution (By JKSSB Mock Tests)
Transpiration from stomata creates negative water potential in leaves, generating a tension (transpiration pull) that draws water upward through the xylem from roots. This cohesion-tension mechanism is the primary driver of water transport in tall trees. Root pressure and capillary action are minor forces.

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The genetic material in most bacteria is:
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B. Double-stranded RNA
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Correct Answer: Option C


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This question belongs to: Science Biology
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Correct Answer: Option A


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The 'Widal test' is a diagnostic test used to detect the presence of antibodies against the causative agent of:
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Correct Answer: Option C


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