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GS Paper IUPSC Prelims 2002
Health & Medicine
Question No. 465Interactive Test Mode
00:00
+2-0.66

Q465. Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species?

Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species?

Select the correct option below (or cross out options to eliminate)
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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2002 • Science and Technology

Correct Answer: Option (B) — Mutation

Concept & Option Breakdown

Standard Reference Verified

Mutations are the primary source of novel genetic variation upon which other evolutionary forces act. According to Hugo de Vries' Mutation Theory, mutations introduce discontinuous, discrete changes (saltation) in the genetic material, providing the raw material fundamentally required for speciation.

Elimination Heuristic & Exam Approach

Mutation introduces fundamentally new genetic alleles, serving as the ultimate root source for the origin of new species.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2002 (Q465)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (B) — Mutation

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Frequently Asked Questions — UPSC Prelims 2002 Q465

What is the official answer for UPSC Prelims 2002 GS Paper I Question 465 (Science and Technology)?

The official UPSC answer key for this 2002 Science and Technology (Health & Medicine) question is Option (B): "Mutation". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2002 question belong to?

This question belongs to GS Paper I under the subject "Science and Technology" and micro-topic "Health & Medicine". You can explore all repeated questions from Health & Medicine in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Health & Medicine UPSC Prelims question using option elimination?

Mutation introduces fundamentally new genetic alleles, serving as the ultimate root source for the origin of new species.

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