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ICSE Class 7 Biology Question 14 of 17

Classification of Animals — Question 3

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Question 3

Write one important function of the following structures along with the group (phyla/ class) of animals in which they are found:

  1. Tentacles
  2. Nephridia
  3. Gills
  4. Muscular foot
  5. Mammary glands
Answer

  1. Tentacles — Tentacles are found in Cnidarians. These finger-like projections surrounding the mouth, called tentacles help in catching food and swimming.

  2. Nephridia — Nephridia are found in Annelids. Nephridia are special organs for excretion.

  3. Gills — Gills are found in Class Pisces. Gills help fishes breathe.

  4. Muscular foot — Muscular foot is found in Molluscs. Mulluscs move with the help of a muscular foot.

  5. Mammary glands — Mammary glands are found in mammals (females). Young ones suckle milk from mammary glands present in mothers.

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.