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ICSE Class 7 Biology Question 17 of 17

Classification of Animals — Question 10

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Question

Question 10

Bones with large air cavities are present in

  1. cnidarians
  2. fish
  3. annelids
  4. birds
Answer

birds

Reason — Birds have air cavities in their bones to make their body light.

Source: This question is from Classification of Animals, Biology — Class 7, ICSE Board.

Key Concepts Covered

This question tests your understanding of the following concepts from the chapter Classification of Animals: Question, Bones, Large, Air, Cavities, Present. These are fundamental topics in Biology that students are expected to master as part of the ICSE Class 7 curriculum.

A thorough understanding of these concepts will help you answer similar questions confidently in your ICSE examinations. These topics are frequently tested in both objective and subjective sections of Biology papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.

How to Approach This Question

Read the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.

Key Points to Remember

  • Use precise scientific terminology as defined in the textbook.
  • Draw and label diagrams neatly for full marks.
  • Understand the difference between structure and function.
  • Learn processes step-by-step in the correct sequence.

Related Questions from Classification of Animals

Practice more questions from Classification of Animals — Biology, Class 7 ICSE

Chapter 2: Classification of Animals — ICSE Class VII Biology Notes

Comprehensive ICSE Class VII Biology notes on Classification of Animals covering invertebrate phyla (Porifera to Echinodermata), vertebrate classes (Pisces to Mammalia), and Whittaker Five Kingdom Classification with solved examples.

Key Concepts and Topics

Topics covered: Invertebrates, Vertebrates, Five Kingdom Classification, Phyla, Classes

Weightage: Approximately 8 marks in the exam

Important Points to Remember

  • 97% of animals are invertebrates without backbone
  • Eight invertebrate phyla from Porifera to Echinodermata
  • Arthropoda is the largest phylum with jointed legs and exoskeleton
  • Five vertebrate classes: Pisces, Amphibia, Reptilia, Aves, Mammalia
  • Cold-blooded vs warm-blooded animals
  • Whittaker Five Kingdom Classification: Monera, Protista, Fungi, Plantae, Animalia
  • Key exceptions: whale is mammal, bat is mammal, penguin is bird

Frequently Asked Questions

Q: What is the largest phylum of animals?

A: Arthropoda, which includes insects, spiders, and crabs.

Q: Why is a whale a mammal and not a fish?

A: Whales breathe through lungs, give birth to live young, and feed milk to their babies.

Q: What are the five kingdoms in Whittaker classification?

A: Monera, Protista, Fungi, Plantae, and Animalia.

Exam Preparation Tips

  • Focus on understanding concepts rather than rote memorization
  • Practice drawing and labelling diagrams regularly
  • Use comparison tables for topics that require differentiation
  • Solve previous year questions and practice papers
  • Review the chapter notes provided by Bright Tutorials for comprehensive coverage

For complete chapter notes, practice questions, and test papers, contact Bright Tutorials at 9403781999.