NCERT Solutions for Class 11 Biology Chapter 4 Animal Kingdom

 

NCERT solutions for class 11 biology chapter 4 animal kingdom: This chapter tells about the Animal Kingdom. When you look around, you will observe that there are different animals with different structures and appearances. As over a million species of animals have been discovered till now, the need for classification becomes all the more important. NCERT solutions for class 11 biology chapter 4 animal kingdom contains solutions which comprise of an explanation of all the questions which are based on the kingdom of animals. In solutions of NCERT class 11 biology chapter 4 animal kingdom you will study the basic fundamental features such as level of organization, symmetry, cell organization, coelom, segmentation, notochord, etc., which have enabled us to broadly classify the animal kingdom. Besides the fundamental features, there are many other distinctive characters which are specific for each class. NCERT solutions for class 11 biology chapter 4 animal kingdom will be also providing you answers related to the questions which are based on the classification of animals. If you are looking for an answer from any other chapter even from any other class then go with NCERT Solutions, there you will get all the answers of NCERT easily.

Here are the important topics of CBSE NCERT solutions for class 11 biology chapter 4 animal kingdom given below:

4.1 Basis of Classification

    4.1.1 Levels of Organisation

    4.1.2 Symmetry

    4.1.3 Diploblastic and Triploblastic Organisation

    4.1.4 Coelom

    4.1.5 Segmentation

    4.1.6 Notochord

4.2 Classification of Animals

    4.2.1 Phylum – Porifera

    4.2.2 Phylum – Coelenterata (Cnidaria)

    4.2.3 Phylum – Ctenophora

    4.2.4 Phylum – Platyhelminthes

    4.2.5 Phylum – Aschelminthes

    4.2.6 Phylum – Annelida

    4.2.7 Phylum – Arthropoda 

    4.2.8 Phylum – Mollusca

    4.2.9 Phylum – Echinodermata

    4.2.10 Phylum – Hemichordata

    4.2.11 Phylum – Chordata

        4.2.11.1 Class – Cyclostomata

        4.2.11.2 Class – Chondrichthyes

        4.2.11.3 Class – Osteichthyes

        4.2.11.4 Class – Amphibia

        4.2.11.5 Class – Reptilia

        4.2.11.6 Class – Aves

        4.2.11.7 Class – Mammalia

Animal Kingdom of class 11 Biology will also tell about other things that come under the Animal Kingdom. Porifera includes multicellular animals that exhibit a cellular level of organization and have characteristic flagellated choanocytes. You will also study annelids, that are metamerically segmented animals with a true coelom. Solutions for NCERT class 11 biology chapter 4 animal kingdom will explain to you all the answers which are related to this topic.

After going through NCERT Class 11 Biology Chapter 4 - Animal Kingdom you must be able to understand all the answer of the following questions:

NCERT solutions for class 11 biology chapter 4 animal kingdom- Solved Exercise Questions

Q1. What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?

Answer:

The fundamental characteristics are basically used to establish relationships between animals while specific characteristics show us how animals despite having similar fundamental characteristics differ from each other. For example, all animals lack a cell wall and are heterotrophs, these are the fundamental characters that put all animals together in kingdom Animalia. However, the presence of mammary glands is a specific character that differentiates mammals from other vertebrates and animals. If common fundamental features are not taken into account then

1. The interrelationship among different animals will not be traceable.

2. The picture of all animals at a glance will not be projected.

3. We won't be able to get a clear picture of how evolution occurred.

Q3. How useful is the study of the nature of body cavity and coelom in the classification of animals?

Answer:

The fluid-filled body cavity derived and lined by mesoderm is called coelom. The study of the nature of the body cavity and coelom is useful because it plays a prominent role in the classification of animals. The animals bearing a coelom are called coelomate while those lacking coelom are called acoelomate. A different type of coelom is also found in animals that are derived from blastocoel of blastula is called pseudocoelom. This coelom is not lined by mesoderm. The coelomates include annelids, molluscs, arthropods, echinoderms, hemichordates, and chordates. Aschelminthes are pseudocoelomates. Acoelomates are poriferans, cnidarians, ctenophores and Platyhelminthes. 

Q4. Distinguish between intracellular and extracellular digestion?

Answer:

The differences between intracellular and extracellular digestion are as follows

Intracellular digestion   Extracellular digestion
The process of digestion of food takes place inside the cells The process of digestion of food takes place outside the cells in the alimentary canal.
Only a few enzymes are involved in the process of digestion A number of enzymes are involved in extracellular digestion
The products of digestion are diffused into the cytoplasm The products of digestion across the intestinal wall into the body parts 
Mostly seen in unicellular animals  Mostly seen in multicellular animals

Q5. What is the difference between direct and indirect development?

Answer:

The differences between direct and indirect development are as follows

Direct development   Indirect development
In this type of development, an embryo develops into a young one without any intermediate larval stage In this type of development, an embryo develops into a young one with some intermediate larval stages. 
Young ones resemble the adult Young ones do not resemble the adult
Seen in fishes, reptiles, birds and mammals Seen in invertebrates and amphibians

Q6. What are the peculiar features that you find in parasitic platyhelminthes?

Answer:

Platyhelminthes are mostly parasites. The peculiar features of platyhelminthes are as follows 

1. The body of platyhelminthes is covered by thick body covering i.e. tegument. It protects the animal from the action of the digestive enzymes of the host. 

2. The body of platyhelminthes is dorsoventrally flattened.

3. Platyhelminthes possess adhesive structures such as suckers and hookers that are helpful in deriving nutrition from the host body

4. Locomotory organs are absent

5. The reproductive system is well developed. Mostly they are hermaphrodite. 

Q7. What are the reasons that you can think of for the arthropods to constitute the largest group of the animal kingdom?

Answer:

The reasons for arthropods being the largest group of animals are as follows:

1.  Presence of tough cuticle for protection of the body. It also helps in tolerating diverse terrestrial conditions. 

2. Presence of striated muscles for quick movements

3. Tracheal respiration for direct supply of oxygen as in insects

4. Presence of jointed appendages for performing diverse functions

5. Well developed nervous system and sense organs. 

6. Presence of pheromones for communication

Q8. Water vascular system is the characteristic of which group of the following:

         (a) Porifera

         (b) Ctenophora

          (c) Echinodermata

          (d) Chordata

Answer:

(c). Echinodermata

Water vascular system is a characteristic feature of echinoderms which help in locomotion, respiration and capturing of food. 

Q9. "All vertebrates are chordates but all chordates are not vertebrates&rdquo." Justify the statement.

Answer:

Phylum chordata includes animals characterised by the presence of notochord. This phylum includes sub-phyla urochordata, cephalochordata and vertebrata. In vertebrates, the notochord is replaced by vertebral column, in urochordates and cephalochordates vertebral column is absent. Thus, all vertebrates are chordates but all chordates are not vertebrates as they can be urochordates and cephalochordates also.

Q10. How important is the presence of air bladder in Pisces?

Answer:

The air bladder is found to be present in the members of class Osteichthyes while it is absent in Chondrichthyes. The main function of air bladder is to regulate buoyancy and help the fishes to float in the water. It also prevents them from sinking in the water. Since Chondrichthyes do not have air bladder they have to swim continuously to avoid sinking. 

Q11. What are the modifications that are observed in birds that help them fly?

Answer:

Modifications in birds to help them fly are as follows:

1. The bones of birds are pneumatic. These contain air cavities making the bones light. This feature helps the birds in flying.

2. The body of birds is streamlined offering least resistance while flying.

3. Flight muscles are well developed

4. Forelimbs of birds are modified into wings to allow flying. Hindlimbs are used for walking, perching etc.

5. Additional air sacs are present to supplement respiration.

Q12. Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?

Answer:

No, the number of eggs produced in oviparous animals and young ones in viviparous animals are not equal. It is because oviparous animals lay eggs outside the body of female in water, land etc so these eggs do not get the conditions that are necessary for the development and hatching of the eggs. Thus, due to the lack of parental care out of the total eggs produced the chances of survival are very low. To compensate for this loss many eggs are produced. On the other hand, the embryos of viviparous animals are inside the body of a female and they get proper nourishment and conditions necessary for their growth and development. Even after they are born, they are provided with parental care. So, the chances of survival are high and only a few young ones could be supported. 

Q14. Match the following:


                    (a) Operculum                     (i) Ctenophora
                    (b) Parapodia                      (ii) Mollusca
                    (c) Scales                            (iii) Porifera
                    (d) Comb plates                  (iv) Reptilia
                    (e) Radula                           (v) Annelida
                    (f ) Hairs                              (vi) Cyclostomata and Chondrichthyes
                    (g) Choanocytes                 (vii) Mammalia
                    (h) Gill slits                         (viii) Osteichthyes

Answer:

(a)-(viii), (b)-(v), (c)-(iv), (d)-(i), (e)-(ii), (f)- (vii), (g)- (iii), (h)- (vi)

                  (a) Operculum                    (viii) Osteichthyes
                    (b) Parapodia                    (v) Annelida
                    (c) Scales                          (iv) Reptilia
                    (d) Comb plates                 (i) Ctenophora
                    (e) Radula                          (ii) Mollusca
                    (f ) Hairs                             (vii) Mammalia
                    (g) Choanocytes                 (iii) Porifera
                    (h) Gill slits                         (vi) Cyclostomata and Chondrichthyes

Q15. Prepare a list of some animals that are found parasitic on human beings.

Answer:

Taenia ( Tapeworm)

Ascaris (roundworm)

Ancylostoma (hookworm)

Enterobius (pinworm)

Wuchereria (filarial worm)

If you are unable to determine these questions or facing any problem to understand them, then go through the book again and then try to solve all the given questions by yourself and then match it from the CBSE NCERT solutions for class 11 biology chapter 4 animal kingdom, as it will help you to prepare not only for the 12th board exam even also for other competitive exams like NEET.

NCERT Solutions for class 11 Biology

Chapter 1

NCERT solutions for class 11 biology chapter 1 the living world

Chapter 2

Solutions of NCERT for class 11 biology chapter 2 biological classification

Chapter 3

CBSE NCERT solutions for class 11 biology chapter 3 plant kingdom

Chapter 4

NCERT solutions for class 11 biology chapter 4 animal kingdom

Chapter 5

Solutions for NCERT class 11 biology chapter 5 morphology of flowering plants

Chapter 6

CBSE NCERT solutions for class 11 biology chapter 6 anatomy of flowering plants

Chapter 7

NCERT solutions for class 11 biology chapter 7 structural organisation in animals

Chapter 8

Solutions for NCERT Class 11 Biology Chapter 8 Cell: The Unit of Life

Chapter 9

CBSE NCERT Solutions for Class 11 Biology Chapter 9 Biomolecules

Chapter 10

NCERT Solutions for Class 11 Biology Chapter 10 Cell Cycle and Cell Division

Chapter 11

Solutions for NCERT Class 11 Biology Chapter 11 Transport in Plants

Chapter 12

CBSE NCERT Solutions for Class 11 Biology Chapter 12 Mineral Nutrition

Chapter 13

NCERT Solutions for Class 11 Biology Chapter 13 Photosynthesis in Higher Plants

Chapter 14

Solutions for NCERT Class 11 Biology Chapter 14 Respiration in Plants

Chapter 15

CBSE NCERT Solutions for Class 11 Biology Chapter 15 Plant Growth and Development

Chapter 16

NCERT Solutions for Class 11 Biology Chapter 16 Digestion and Absorption

Chapter 17

Solutions for NCERT Class 11 Biology Chapter 17 Breathing and Exchange of Gases

Chapter 18

CBSE NCERT Solutions for Class 11 Biology Chapter 18 Body Fluids and Circulation

Chapter 19

NCERT solutions for class 11 biology chapter 19 excretory products and their elimination

Chapter 20

Solutions for NCERT class 11 biology chapter 20 locomotion and movement

Chapter 21

CBSE NCERT solutions for class 11 biology chapter 21 neural control and coordination

Chapter 22

NCERT solutions for class 11 biology chapter 22 chemical coordination and integration

NCERT Solutions for Class 11- Subject wise

NCERT solutions for Class 11 Maths

Solutions for NCERT Class 11 Chemistry

CBSE NCERT solutions for Class 11 Physics

What are the benefits of NCERT solutions for class 11 biology chapter 4 animal kingdom:

  • NCERT is the base of your learning.
  • CBSE NCERT solutions for class 11 biology chapter 4 animal kingdom will also help you with competitive exams like NEET.
  • You will get all the answers to this chapter and it will help you to score good marks in the exam.
  • NCERT solutions for class 11 biology chapter 4 animal kingdom will also help you in your 12th board exam.
  • It will also boost your knowledge.
 

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