Match List - I with List - II.
| List-I | List-II | ||
| (a) | Adaptive radiation |
(i) | Selection of resistant varieties due to excessive use of herbicides and pesticides |
| (b) | Convergent evolution |
(ii) | Bones of forelimbs in Man and Whale |
| (c) | Divergent evolution |
(iii) | Wings of Butterfly and Bird |
| (d) | Evolution by anthropogenic action |
(iv) | Darwin Finches |
Correct Answer :
(a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
Solution :
The correct option is (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i).
Let us analyze and match each term from List-I with its corresponding example in List-II step-by-step:
(a) Adaptive radiation matches with (iv) Darwin Finches:
Adaptive radiation is an evolutionary process in which a single ancestral species diversifies into many different forms to occupy various ecological niches. Darwin's finches of the Galápagos Islands are a classic example of this. From an original seed-eating ancestor, many species arose with differently shaped beaks suited for eating seeds, insects, cactus, etc.
(b) Convergent evolution matches with (iii) Wings of Butterfly and Bird:
Convergent evolution occurs when unrelated or distantly related organisms independently evolve similar features (analogous structures) to adapt to similar functions or environments. The wings of a butterfly (non-chordate, insect structure) and a bird (chordate, avian forelimb structure) have completely different anatomical designs but serve the same function: flight.
(c) Divergent evolution matches with (ii) Bones of forelimbs in Man and Whale:
Divergent evolution is the accumulation of differences between closely related populations or species, leading to the formation of new species, often resulting in homologous structures. Homologous structures share a common anatomical blueprint but perform different functions. The forelimbs of humans (used for grasping) and whales (modified into flippers for swimming) share the same basic skeletal pattern (humerus, radius, ulna, carpals, metacarpals, and phalanges), indicating a common evolutionary ancestor.
(d) Evolution by anthropogenic action matches with (i) Selection of resistant varieties due to excessive use of herbicides and pesticides:
Anthropogenic action refers to human-driven activities. The rapid selection and evolution of herbicide-resistant weeds and pesticide-resistant insect varieties are direct consequences of human intervention and the intensive application of chemical agents over a relatively short period.
Thus, matching the columns gives:
• (a) - (iv)
• (b) - (iii)
• (c) - (ii)
• (d) - (i)
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