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

Given below are two statements in relation to limitation of capillarity theory.
Statement I: Xylem, i.e. capillarity tube, must be with closed end walls and not hollow.
Statement II: The capillarity tube i.e. xylem is not in direct contact with soil water and contains barrier of root between xylem and soil water.
In the light of above statements, Choose the most appropriate answer from the options given below:

A Both Statement-I and Statement-II are correct.
B Both Statement-I and Statement-II are incorrect.
C Statement-I is correct and Statement-II is incorrect.
D Statement-I is incorrect but Statement-II is correct.

Verified Solution

Answer & Solution

Correct Answer

(D) Statement-I is incorrect but Statement-II is correct.

Step-by-step Solution

Detailed explanation

Capillary tube (xylem) must be continously and completely hollow from one end to the other end.

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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	Column I (Part of the alimentary canal)		Column II (length)
i.	Duodenum	a.	1.5 m
ii.	Jejunum	b.	26 cm
iii.	Ileum	c.	25 m
iv.	Large intestine	d.	3.5 m