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Early-morning water droplets ooze from the leaf margins of grass through special pores when soil water is plentiful. This phenomenon and the pores involved are which pair?
ATranspiration through stomata
BOsmosis through sieve plates
CGuttation through hydathodes
DPlasmolysis through lenticels
Answer & Solution
Correct answer: C. Guttation through hydathodes
1. The clue is liquid droplets, not vapour, appearing at leaf margins in humid mornings.
2. This exudation is driven by root pressure pushing excess water out.
3. Option A (transpiration through stomata) releases water as vapour, not liquid drops, so it is the trap.
4. Option B pairs osmosis with sieve plates, but sieve plates conduct food in phloem, not exude water.
5. Option D names plasmolysis, which is protoplasm shrinkage, the opposite of water exit through pores.
6. Liquid water is forced out through special pores called hydathodes.
7. This phenomenon is guttation, so the answer is option C.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 14 Transportation in Plants and Circulation in Animals "More to Know", p.211_
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