MHT CET · BIOLOGY · STD 12 - 5. Origin and Evolution of Life

Which of the following are analogous organs?

A Forelimbs of Horse and of Birds.
B Brains in vertebrate animals.
C Eye of octopus and of mammals.
D Thorns of Bougainvillea and tendrils of Cucurbita

Verified Solution

Answer & Solution

Correct Answer

(C) Eye of octopus and of mammals.

Step-by-step Solution

Detailed explanation

(A) forelimbs of horse and birds, (B) brains in vertebrate animals, and (D) thorns of Bougainvillea and tendrils of Cucurbita, are examples of homologous organs where they share a common evolutionary origin despite differences in structure and function.

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

Identify the CORRECT match from the Columns I, II and III.

I	II	III
1. Interstitial cells	a. Cortex of ovary	i. Follicular fluid
2. Sertoli cells	b. Ovarian follicle	ii. Progesterone
3. Granulosa cells	c. Testis	iii. Attachment of sperm bundle
4. Cells of corpus luteum	d. Seminiferous tubules	iv. Testosterone

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