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GS Paper IUPSC Prelims 2007
Health & Medicine
Question No. 424Interactive Test Mode
00:00
+2-0.66

Q424. How do most insects respire?

How do most insects respire?

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 2007 • Science and Technology

Correct Answer: Option (D) — By tracheal system

Concept & Option Breakdown

Standard Reference Verified

Insects respire through a tracheal system, an intricate internal network of air-filled tubes (tracheae and microscopic tracheoles) that transport atmospheric gases directly to and from body tissues. Air enters through lateral body wall openings called spiracles and diffuses through the branching tracheoles directly to individual cells without relying on the circulatory system for oxygen transport.

Elimination Heuristic & Exam Approach

The respiratory system of terrestrial insects is uniquely characterized by spiracles and a branching tracheal network.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2007 (Q424)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (D) — By tracheal system

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Frequently Asked Questions — UPSC Prelims 2007 Q424

What is the official answer for UPSC Prelims 2007 GS Paper I Question 424 (Science and Technology)?

The official UPSC answer key for this 2007 Science and Technology (Health & Medicine) question is Option (D): "By tracheal system". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2007 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?

The respiratory system of terrestrial insects is uniquely characterized by spiracles and a branching tracheal network.

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