MHT CET · BIOLOGY · STD 12 - 6. Plant Water Relation

Which of the following statements are correct regarding the factors affecting absorption by plants?
i. In dicots, the guard cells are dumbbell shaped.
ii. The transport of food through phloem is bidirectional.
iii. Capillary water is available to plants.
iv. Lenticels are small, raised structures composed of compactly arranged complementary cells.
v. Stomatal transpiration occurs during day time only.
Choose the correct option:

A i, ii and iii only
B ii, iii and iv only
C i, iii and iv only
D ii, iii and v only

Verified Solution

Answer & Solution

Correct Answer

(D) ii, iii and v only

Step-by-step Solution

Detailed explanation

Guard cells are kidney shaped in dicotyledons and dumbbell-shaped in grasses (monocotyledons / monocots).
Lenticels are small raised structures composed of loosely arranged complementary cells.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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