NCERT Class 11-Biology: Chapter –4 Animal Kingdom

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Question 4:

Fill up the blank spaces appropriately

Spaces Appropriately
Spaces appropriately

Phylum/Class

Excretory Organ

Circulatory Organ

Respiratory Organ

Arthropoda

Lungs/ Gills/ Tracheal System

Nephridia

Closed

Skin/parapodia

Metanephridia

Open

Amphibia

Closed

Lung

Answer:

Fill up the Blank Spaces Appropriately
Fill up the Blank Spaces Appropriately

Phylum/Class

Excretory Organ

Circulatory Organ

Respiratory Organ

Arthropoda

A

B

Lungs/ Gills/ Tracheal System

C

Nephridia

Closed

Skin/parapodia

D

Metanephridia

Open

E

Amphibia

F

Closed

Lung

A = Malpighian Tubule/ coxal glands/anternary glands/ green glands

B = Open

C = Annelida

D = Mollusca

E = Feather like gills

F = Kidney

Question 5:

Match the following

Question 4 Match the Following Table
Question 4 Match the Following Table

a.

Amphibia

i.

Air bladder

b.

Mammals

ii.

Cartilaginous notochord

c.

Chondrichthyes

iii.

Mammary glands

d.

Ostichthyes

iv.

Pneumatic bones

e.

Cyclostomata

v.

Dual habitat

f.

Aves

vi.

Sucking and circular mouth without jaws.

Answer:

A. - (v) B. - (iii) C. - (ii) D. - (i) E. - (vi) F. - (iv)

a. Amphibians possess dual habitat, i.e., they are found in both aquatic and terrestrial habitat. Their larva is completely aquatic and adult lives in terrestrial as well as in aquatic habitat

b. Mammals have mammary glands which produce milk and feed their young ones. The mammary glands are enlarged exocrine modified sweat glands functional in female mammals.

c. Chondrichthyes have the cartilaginous rod (notochord) in the young stage which is gradually replaced by cartilage.

d. Osteichthyes have air bladder which is a vesicle or sac containing air,

e. Cyclostomes possess sucking and circular mouth without jaws which is surrounded by tentacles and the tongue bears teeth, e.g., lamprey and nag fish.

f. Aves have light weighted bones with internal spaces filled with air called pneumatic bones and aerodynamic lungs with specialized air sacs. These are the adaptations which enable birds to fly.

Question 6:

Endoparasites are found inside the host body. Mention the special structure, possessed by these and which enables them to survive in those conditions.

Answer:

The life cycles of endoparasities are more complex because of their extreme specialization. Their morphological and anatomical features are greatly simplified while emphasizing their reproductive potential. In accordance with their life style parasites evolve special adaptations such as:

1. Loss of unnecessary sense organs.

2. Loss of digestive system.

3. High reproductive capacity.

4. Presence of adhesive organs or suckers to cling on to the host.

Question 7:

Match the following and write correct choice in space provided

Question 7 Table of Animal and Characteristics
Question 7 Table of Animal and Characteristics

Animal

Characteristics

a.

Pila

i.

Jointed appendages

b.

Cockroach

ii.

Perching

c.

Asterias

iii.

Water vascular system

d.

Torpedo

iv.

electric organ

e.

Parrot

v.

Presence of shell

f.

Dog fish

vi.

Placoid scales

a. ____________________, b. ____________________, c. ____________________ d. ____________________, e. ____________________, f. ____________________

Answer:

(a)(v), (b)(i), (c)(iii), (d)(iv), (e)(ii), (f) (vi)

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