KCET · BIOLOGY · STD 11 - 4. Animal Kingdom

Observe the following simplified scheme and choose the correct option that matches with the letters given in the boxes.

A p-Agnatha, q- Gnathostomata, r-Tetrapoda, s-Pisces.
B p-Agnatha, q-Gnathostomata, r-Pisces, s-Tetrapoda.
C p-Gnathostomata, q-Agnatha, r-Tetrapoda, s-Pisces.
D p-Tetrapoda, q-Pisces, r-Gnathostomata, s-Agnatha.

Verified Solution

Answer & Solution

Correct Answer

(B) p-Agnatha, q-Gnathostomata, r-Pisces, s-Tetrapoda.

Step-by-step Solution

Detailed explanation

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

In a population of plants, some were extremely tall, and the remaining were extremely dwarf. No plants of the population showed intermediate height. The type of operation of natural selection in the above case is

KCET 2020 Hard

Match Column I with Column II.

Column-I	Column-II
(A) Narrowly utilitarian argument	(i) Conserving biodiversity for major ecosystem services
(B) Broadly utilitarian argument	(ii) Every species has an intrinsic value and moral duty to pass our biological legacy in good order to future generation
(C) Ethical argument	(iii) Receivingbenefits like food, medicine and industrial products

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