“All vertebrates are chordates but all c | Class 11 Biology Chapter Animal Kingdom, Animal Kingdom NCERT Solutions

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Academic session 2026-27, Chapter 4 in the current curriculum.

Welcome to the NCERT Solutions for Class 11 Biology - Chapter Animal Kingdom. This page offers a step-by-step solution to the specific question from Exercise 1, Question 9: “All vertebrates are chordates but all chordates are not vertebrates”. Justify the statement.. With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

Question 9: “All vertebrates are chordates but all chordates are not vertebrates”. Justify the statement.
Answer:

The characteristic features of the phylum Chordata include the presence of a notochord and paired pharyngeal gill slits. In sub-phylum Vertebrata, the notochord present in embryos gets replaced by a cartilaginous or bony vertebral column in adults. But in cephelochordates, notochord persists throughout life as such and in urochordates, notochord is present only in larval stages and absent in adults. Thus, it can be said that all vertebrates are chordates but all chordates are not vertebrates.

  • Other Questions of Chapter Animal Kingdom

Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

  • Read the question carefully and focus on the core concept being asked.
  • Reference examples and data from the chapter when answering questions about Animal Kingdom.
  • Review previous year question papers to get an idea of how such questions may be framed in exams.
  • Practice answering questions within the time limit to improve your speed and accuracy.
  • Discuss your answers with your teachers or peers to get feedback and improve your understanding.

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  • Tegemeo mwakalasya
  • Jun 12, 2020

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  • Wahab Rumon
  • Apr 17, 2020

Thanks

  • Taran
  • Dec 01, 2019

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  • Oct 24, 2019

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  • Oct 14, 2019

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  • Sep 19, 2019

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  • Sep 16, 2019

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  • Riya
  • Sep 12, 2019

Nice explanation. Thank you so much

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  • Aug 22, 2019

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  • Alal uddin
  • Aug 05, 2019

Thank a lot of, It's easy to understand

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Welcome to the NCERT Solutions for Class 11 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 9: “All vertebrates are chordates but all chordates are not vertebrates”. Justify the statement.....

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