NEET · Biology · STD 12 - 6. evolution

Match List I with List II with respect to chronology of evolution of life forms :
List I List II
A. About 65 mya I. Jawless fish probably evolved
B. About 500 mya II. The dinosaurs suddenly disappeared from the earth
C. About 350 mya III. Seedweeds and few plants probably existed
D. About 320 mya IV. Invertebrates were formed and became active
Choose the correct answer from the options given below :

A A-III, B-IV, C-I, D-II
B A-I, B-III, C-II, D-IV
C A-II, B-IV, C-III, D-I
D A-II, B-IV, C-I, D-III

Verified Solution

Answer & Solution

Correct Answer

(D) A-II, B-IV, C-I, D-III

Step-by-step Solution

Detailed explanation

(D) A-II, B-IV, C-I, D-III
According to the geological time scale and evolution of life forms:
About 65 mya, the dinosaurs suddenly disappeared from the earth. (A → II)
About 500 mya, invertebrates were formed and became active. (B → IV)
About 350 mya, jawless fish probably evolved. ( \(C \rightarrow I\) )
About 320 mya, seaweeds and few plants probably existed. (D → III)
Thus, the correct matching is A-II, B-IV, C-I, D-III.

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 (Placentation)	List II (Example)
A. Marginal	I. Mustard
B. Axile	II. Pea
C. Parietal	III. Marigold
D. Basal	IV. Lemon

List I	List II
A. About 65 mya	I. Jawless fish probably evolved
B. About 500 mya	II. The dinosaurs suddenly disappeared from the earth
C. About 350 mya	III. Seedweeds and few plants probably existed
D. About 320 mya	IV. Invertebrates were formed and became active