Question

Echinoderm larvae exhibit bilateral symmetry before transforming into radially symmetrical adults. In starfish, which of the following best explains the developmental transition in relation to larval form and metamorphosis?

Asked in UP PGT (Biology) · 2026
Animal Kingdom · Biology
Exam PYQ4 Options
BiologyDiversity in The Living WorldAnimal KingdomArthropoda, Mollusca and EchinodermataUP PGT (Biology)2026
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Angiosperms form seeds enclosed within fruits.

Correct AnswerCorrect option for this question
Option D — The brachiolaria larva attaches to a substrate, followed by extensive reorganization of internal structures leading to pentaradial symmetry in the adult

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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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