Question

Choose the correct option for the Assertion (A) and Reason (R) given below:
Assertion (A) : In Scoliodon, propulsion during swimming is primarily generated by lateral undulations of the body rather than by active flapping of paired fins.
Reason (R) : The myotomal musculature arranged in segmental blocks produces alternating contractions on either side of the body, generating a wave that travels from head to tail.

Asked in UP PGT (Biology) · 2026
Animal Kingdom · Biology
Exam PYQ4 Options
BiologyDiversity in The Living WorldAnimal KingdomHemichordata and ChordataUP PGT (Biology)2026
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Quick Revision

Photosynthesis uses light energy to convert carbon dioxide and water into carbohydrates.

Correct AnswerCorrect option for this question
Option A — Both (A) and (R) are true, and (R) is the correct explanation of (A).

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Questions Asked from Animal Classification: Basis & Non-Chordate Phyla Part 1 in Previous Exams

See how often Animal Classification: Basis & Non-Chordate Phyla Part 1 has appeared in previous-year questions across major government exams.

High Exam Frequency
12UPSC Questions Asked in These Years:2010, 2011, 2012, 2014, 2015, 2017, 2018, 2019, 2020, 2021, 2022, 2023
10SSC Questions Asked in These Years:2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
8Railways Questions Asked in These Years:2016, 2018, 2020, 2021, 2022, 2024, 2025, 2026
13State PSC Questions Asked in These Years:2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2022, 2023, 2024, 2025
Animal Classification: Basis & Non-Chordate Phyla Part 1 has appeared in 43 previous-year exam questions, most frequently in State PSC, UPSC and SSC.
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