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What are the modifications that are observed in birds that help them f...

What are the modifications that are obse | Class 11 Biology Chapter Animal Kingdom, Animal Kingdom NCERT Solutions

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 11: . 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 11: What are the modifications that are observed in birds that help them fly?

Answer:

Birds have undergone many structural adaptations to suit their aerial life. Some of these adaptations are as follows.

(i) Streamlined body for rapid and smooth movement

(ii) Covering of feathers for insulation

(iii) Forelimbs modified into wings and hind limbs used for walking, perching, and swimming

(iv) Presence of pneumatic bones to reduce weight

(v) Presence of additional air sacs to supplement respiration

Other Questions of Chapter Animal Kingdom

Q: Distinguish between intracellular and extracellular digestion?

Excretory organs of different animals are given below. Choose correctly and write in the space provided.
Animal Excetory Organ/Unit
a. Balanoglossus i. Metanephridia
b. Leech ii. Nephridia
c. Locust iii. Flame cells
d. Liver fluke iv. absent
e. Sea urchin v. malpighian tubule
f. Pila vi. Proboscis gland
a. ____________________, b. ____________________, c. ____________________
d. ____________________, e. ____________________, f. ____________________

Name the animal, which exhibits the phenomenon of bioluminescence. Mention the phylum to which it belongs.

Mention two modifications in reptiles required for terrestrial mode of life.

Q: What are the peculiar features that you find in parasitic platyhelminthes?

Q: 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

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

Q: If you are given a specimen, what are the steps that you would follow to classify it?

Q: �All vertebrates are chordates but all chordates are not vertebrates�. Justify the statement.

Give the characteristic features of the following citing one example of each
a. Chondrichthyes and ostichthyes
b. Urochordata and cephalochordata

Popular questions of class 11 Biology

Q: Describe briefly the four major groups of Protozoa.

Q: Why are living organisms classified?

Q: State two economically important uses of: (a) Heterotrophic bacteria (b) Archaebacteria

Define a taxon. Give some examples of taxa at different hierarchical levels.

Q: Describe the important properties of enzymes.

What are the steps involved in formation of a root nodule?

Q: Illustrate the taxonomical hierarchy with suitable examples of a plant and an animal.

Q: How is a key helpful in the identification and classification of an organism?

Q: What is stomatal apparatus? Explain the structure of stomata with a labelled diagram.

Q: Define and understand the following terms:
(i) Phylum
(ii) Class
(iii) Family
(iv) Order
(v) Genus

Recently Viewed Questions of Class 11 Biology

Name the pathological condition when uncontrolled cell division occurs.

Aquatic animals generally are ammonotelic in nature where as terrestual forms are not. Comment.

Name the cells/tissues in human body which
a. exhibit ameboid movement
b. exhibit ciliary movement

Q: How is the study of plant anatomy useful to us?

How do you distinguish between a skeletal muscle and a cardiac muscle?

Q: Explain the term thecodont and diphyodont.

Why earthworm is called the friend of farmer?

Q: Draw the labelled diagram of the following:
(i) Gram seed
(ii) V.S. of maize seed

Which of the following is correct:
(a) Cells of all living organisms have a nucleus.
(b) Both animal and plant cells have a well defined cell wall.
(c) In prokaryotes, there are no membrane bound organelles.
(d) Cells are formed de novo from abiotic materials.

Mitosis results in producing two cells which are similar to each other. What would be the consequence if each of the following irregularities
occur during mitosis?
a. Nuclear membrane fails to disintegrate
b. Duplication of DNA does not occur
c. Centromeres do not divide
d. Cytokinesis does not occur.

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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Comments

Alal uddin
Aug 21, 2019

Thank you very much for given this questions answers

montu pegu
Aug 08, 2019

Thanks

Xing ho re
Jul 26, 2019

Thank you very much

Amaan
Apr 02, 2019

Nice

Vishmitha Vijay
Jul 28, 2018

Goodð Thank you