NEET · Biology · STD 11 - 6. Anatomy flowering plants

Given below are two statements : One is labelled as Assertion \(A\) and the other is labelled as Reason \(R\):
Assertion \(A\) : Late wood has fewer xylary elements with narrow vessels.
Reason \(R\) : Cambium is less active in winters.
In the light of the above statements, choose the correct answer from the options given below :

A \(A\) is false but \(R\) is true
B Both \(A\) and \(R\) are true and \(R\) is the correct explanation of \(A\)
C Both \(A\) and \(R\) are true but \(R\) is NOT the correct explanation of \(A\)
D \(A\) is true but \(R\) is false

Verified Solution

Answer & Solution

Correct Answer

(B) Both \(A\) and \(R\) are true and \(R\) is the correct explanation of \(A\)

Step-by-step Solution

Detailed explanation

In winter, the cambium is less active and forms fewer xylary elements that have narrow vessels, and this wood is called autumn wood or late wood.

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.

Same subject

Which of the following is wrongly matched in the given table ?

Microbe	Product	Application
\((a)\) Streptococccus	Streptokinase	Removal of clot fromblood vessel
\((b)\) Clostridium butylicum	Lipase	Removal of oil stains
\((c)\) Trichoderma polysporum	Cyclosporin \(A\)	Immuno-suppressive drug
\((d)\) Monascus purpureus	Statins	Lowering of blood cholesterol

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