NCERT Solutions for Class 11 Biology Chapter 4 Animal Kingdom


NCERT Solutions for Class 11 Biology Chapter 4 Animal Kingdom are a very beneficial & useful study material for the students to prepare for exams in order to score good marks as well as to complete their assignment.

CBSE Class 11 Biology chapter 4 NCERT Solutions assist the students to learn about the Classification of animals, about all animal species.

NCERT Solutions for Class 11 Biology Chapter 4 – Animal Kingdom

Class 11 Biology chapter 4 NCERT Solutions provide answers to all the exercise questions that are available in the NCERT textbook. These Solutions are prepared by subject experts who crafted these Solutions accurately and to the point so that the students can understand the topic.

The students must download 11th Biology chapter 4 solutions pdf as it serves as an excellent tool for study well for the final exam to get high ranks. These Solutions are extremely comprehensible and easy to understand.

You can download CBSE 11th Biology Chapter 4 solutions from below.

Download NCERT Class 11 Biology Chapter 4 Solutions

What will you learn in NCERT Class 11 Biology Chapter 4?

In Biology chapter 4, the students will learn the differences in structure and form of different animals. They will study about a few fundamental features that are common to several individuals in relation to the organization of cells, body symmetry, nature of coelom, pattern of different systems like digestion, circulatory or reproductive systems.

They will learn fundamental features that form the basis for the Classification of animals in detail. Class 11 Biology chapter 4 solutions pdf include answers to all the questions completely which are accurately presented for the benefit of students to score good marks. These Solutions are prepared in a detailed and step by step explanation that assists the students to clear all their doubts & understand the topic clearly.

NCERT Solutions are prepared in a step-wise manner to boost the exam preparations of the students and also assists them to self analyze the topics that need clarity. These Solutions enable the students to write the exercise problems in a shorter duration and also make them clear about the concepts.

Chapter 4 solutions cover the following exercises,

  • Exercise 4.1 – Basis of Classification
  • Exercise 4.2 – Classification of animals

Important terms in Class 11 Biology Chapter 4

1. Asymmetrical: Cannot be divided into equal halves through median plane e.g., Sponges. Radial symmetry: Any plane passing through central axis can divide organism into identical halves. e.g., coelentrates, Ctenophores and echinoderms.

2. Metamerism: If body is externally and internally divided into segments (metameres) with serial repetition of atleast some organs, then phenomenon is called metamerism e.g., Earthworm.

3. Pseudometamerism: Found in tapeworm. The proglottids (segments of tapeworm) budded off from neck not emryonic in origin.

4. Notochord: Rod-like structure formed during embryonic development on t he dorsal side. It is mesodermally derived e.g., Chordates. Non-chordates do not have notochord .e.g., porifera to echinoderms.


1. Also called as sea walnuts or comb jellies.

2. Are exclusively marine, radially symmetrical.

3. Have tissue level organisation, are diploblastic.

4. Digestion both extra and intracellular.

5. Body has eight external rows of ciliated comb plates for locomotion.

6. Show Bioluminescence (Property of living organisms to emit light).

7. Hermaphrodite (sexes are not separate).

8. Only sexual reproduction occurs. Exernal fertilization. Indirect development. e.g., Ctenoplana, Pleurobrachia.

Phyum Annelida

1. Are aquatic or terrestrial, free-living or parasitic.

2. Are bilaterally symmetrical, triploblastic, organ-system level of organisation and metamerically segmented body.

3. Are coelomate animals.

4. Have longitudinal and circular muscles for locomation.

5. Have closed circulatory system.

6. Nereis (dioecious and aquatic annelid) has lateral appendages called parapodia for swimming.

7. Have nephridia for osmoregulation and excretion.

8. Neural system consists of paired gangila connected by lateral nerves to a double ventral nerve cord.

9. Reproduction is sexual. e.g., Earthworm (Pheretima) and Leech (Hirudinaria) which are hermaph rodites (i.e., monoecious).


We have covered the complete guide on CBSE NCERT Solutions for Class 11 Biology Chapter 4 Animal Kingdom. Feel free to ask us any questions in the comment section below.

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