Question

While both Herdmania and Amphioxus belong to protochordates, their adult organization reflects contrasting evolutionary trends. Which of the following best explains this contrast in terms of chordate features and body plan organization?

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

Xylem transports water and dissolved minerals; phloem carries prepared food.

Correct AnswerCorrect option for this question
Option C — Herdmania exhibits chordate features only during larval stage with a sessile, degenerate adult form, whereas Amphioxus retains fundamental chordate characters throughout life with a persistent notochord

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Questions Asked from Chordates: Fish, Amphibia, Reptilia, Aves & Mammalia in Previous Exams

See how often Chordates: Fish, Amphibia, Reptilia, Aves & Mammalia has appeared in previous-year questions across major government exams.

High Exam Frequency
13UPSC Questions Asked in These Years:2010, 2011, 2012, 2013, 2014, 2015, 2019, 2020, 2021, 2022, 2023, 2024, 2026
9SSC Questions Asked in These Years:2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
8Railways Questions Asked in These Years:2016, 2018, 2020, 2021, 2022, 2024, 2025, 2026
16State PSC Questions Asked in These Years:2002, 2004, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
Chordates: Fish, Amphibia, Reptilia, Aves & Mammalia has appeared in 46 previous-year exam questions, most frequently in State PSC, UPSC and SSC.
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