Animal Kingdom Book Back Questions 9th Science Lesson 17

9th Science Lesson 17

17] Animal Kingdom

Book Back Questions with Answer and Do You Know Box Content

Do You Know?

Notochord is a rod like structure formed on the mid-dorsal side of the body during embryonic development. Except primitive forms in which the notochord persists throughout life in all other animals it is replaced by a backbone.

Centipede means ‘hundred legs’. But most species have only 30 pairs. Millipedes have two pairs of legs on each segment. This name means ‘thousand legs’. But, most millipedes have only about a hundred.

Octopus is the only invertebrate that is capable of emotion, empathy, cognitive function, self awareness, personality and even relationships with humans. Some speculate that without humans, octopus would eventually take our place as the dominate life form on earth.

The smallest vertebrate, Philippine goby/dwarf pygmy goby is a tropical species fish found in brackish water and mangrove areas in south East Asia, measuring only 10 mm in length.

The Chinese giant salamander Andrias davidians is the largest amphibian in the world. Its length is about five feet and eleven inches. Its weighs about 65 kg, found in Central and South China.

State bird of Tamil Nadu: Common Emerald dove (Chalcophaps indica).

The gigantic Blue whale which is 35 metres long and 120 tons in weight is the biggest vertebrate animal.

Choose the best answers:

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, Earth worm, Ascidian

(c) Hydra, Tape worm, Earth worm, Balanoglossus

(d) Hydra, Tape worm, Ascaris, Earth worm

7. Poikilothermic organisms are

(a) Fish, Frog, Lizard, Man

(b) Fish, Frog, Lizard, Cow

(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) Earth worm

(c) Star fish

(d) Ascaris

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.

State 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 repitilans are smooth and moist.

8. Wings of birds are the modified forelimbs.

9. Female mammals have mammary glands.

Match the following:

PHYLUM EXAMPLES

1. Coelenterata – Snail

2. Platyhelminthes – Starfish

3. Echnodermata – Tapeworm

4. Mollusca – Hydra

Choose the best answers:

1. Echinodermata 2. Coelenterata 3. Fishes and Amphibians 4. Crocodile 5. Acrania 6. Hydra, Tape worm, Ascaris, Earthworm

7. Fish, Frog, Lizard, Snake 8. Bird 9. flame cells 10. Star fish

Fill in the blanks:

1. Spicules 2. Octopus 3. Cartilaginous 4. Tadpole 5. Cyclostomes 6. Placenta 7. Egg laying

State true or false. If false, correct the statement:

1.False

Correct answer: Canal system is seen in Porifera

2.True

3.False

Correct answer: Trachea are the respiratory organ of Arthropoda

4.False

Correct answer: Bipinnaria is the larva of Echinodermata

5.True

6.True

7.False

Correct answer: Skin of reptilians are homy epidermal scales

8.True

9.True

Match the following:

1.Coelenterata- Hydra

2.Platyhelminthes- Tapeworm

3.Echinodermata- starfish

4.Mollusca- Snail