CUET · BIOLOGY · PYQ PAPER 2025

Which one of the given approaches is used when the animals and plants are endangered?

A In situ conservation
B Ex situ conservation
C Endemism
D Alien species introduction

Verified Solution

Answer & Solution

Correct Answer

(A) In situ conservation

Step-by-step Solution

Detailed explanation

In situ conservation

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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LIST I (Beta)	LIST II
A. \(\beta\)-galactosidase	I. amp \(^{ R }\)
B. pBR322	II. Molecular Scissors
C. Ligases	III. Insertional inactivation
D. Restriction enzyme	IV. Join foreign DNA to plasmid

List-I (Integral)	List-II (Value)
(A) \(\int_{-1}^1(\|x\|+1) d x\)	(I) 0
(B) \(\int_{-2}^2\|x+1\| d x\)	(II) 2
(C) \(\int_{-1}^1 3\|x\|^2 d x\)	(III) 5
(D) \(\int_{-1}^1 x\|x\| d x\)	(IV) 3