Animal Kingdom

Samacheer Book Back Questions And Answers For Science Standard 9 “Animal Kingdom“

I. Choose the correct answer:
1. Find the group having only marine members.
(a) Mollusca
(b) Coelenterata
(c) Echinodermata
(d) Porifera

2. Mesoglea is present in
(a) Porifera
(b) Coelenterata
(c) Annelida
(d) Arthropoda

3. Which one of the following pairs is not a poikilothermic animal?
(a) Fishes and Amphibians
(b) Amphibians and Aves
(c) Aves and Mammals.
(d) Reptiles and Mammals

4. Identify the animal having four chambered heart.
(a) Lizard
(b) Snake
(c) Crocodile
(d) Calotes

5. The animal without skull is
(a) Acrania
(b) Acephalia
(c) Apteria
(d) Acoelomate

6. Hermaphrodite organisms are
(a) Hydra, Tape worm, Earthworm, Amphioxus
(b) Hydra, Tape worm, Earthworm, Ascidian
(c) Hydra, Tape worm, Earthworm, Balanoglossus
(d) Hydra, Tape worm, Ascaris, Earthworm

7. Poikilothermic organisms are
(a) Fish, Frog, Lizard, Man
(b) Fish, Frog, Lizard, Crow
(c) Fish, Frog, Lizard, Snake
(d) Fish, Frog, Lizard, Crow

8. Air sacs and Pneumatic bones are seen in
(a) fish
(b) frog
(c) bird
(d) bat

9. Excretory organ of tape worm is
(a) flame cells
(b) nephridia
(c) body surface
(d) solenocytes

10. Water vascular system is found in
(a) Hydra
(b) Earthworm
(c) Star fish
(d) Ascaris

II. Fill in the blanks:
1. The skeletal framework of Porifera is _____.
2. Ctenidia are respiratory organs in _____.
3. Skates are _____ fishes.
4. The larvae of an amphibian is _____.
5. _____ are jawless vertebrates.
6. _____ is the unique characteristic feature of mammal.
7. Spiny anteater is an example for _____ mammal.

Answers:
1. spicules
2. phylum mollusca
3. cartilaginous
4. bilaterally symmetrical
5. Cyclostomes
6. Placenta
7. egg-laying

III. State whether true or false. If false, correct the statement:
1. Canal system is seen in coelenterates.
2. Hermaphrodite animals have both male and female sex organs.
3. Trachea are the respiratory organ of Annelida.
4. Bipinnaria is the larva of Mollusca.
5. Balanoglossus is a ciliary feeder.
6. Fishes have two chambered heart.
7. Skin of reptilians are smooth and moist.
8. Wings of birds are the modified forelimbs.
9. Female mammals have mammary glands.

Answers:
1. False (Canal system is seen in porifera)
2. True
3. False (Trachea are the respiratory organ of Arthopoda)
4. False (Bipinnaria is the larva of star fish)
5. True
6. True
7. False (Skin of amphibians are smooth and moist)
8. True
9. True

IV. Match the following:
 Phylum                    Examples
1. Coelenterata           A. Snail
2. Platyhelminthes      B. Starfish
3. Echinodermata       C. Tapeworm
4. Mollusca                 D. Hydra

Answers:
1. D
2. C
3. B
4. A

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