9th Std Science Solution in English | Lesson.17 Animal Kingdom

Lesson 17 Animal Kingdom

9th Science Guide: In this post titled “Lesson 17: Animal Kingdom,” various questions related to the animal kingdom are presented along with their respective answers. The post is divided into three sections: “I. Choose the correct answer,” “II. Fill in the blanks,” and “III. State whether true or false.” Each section consists of multiple questions that test the reader’s knowledge of different aspects of the animal kingdom.

Animal Kingdom Book Back Answer

Below you can find the solution for the Lesson Animal Kingdom for English Medium Students in Tamil Nadu. We have also listed some extra questions related to the topic of Animal Kingdom.

I. Choose the correct answer

1. Find the group having only marine members

1. Mollusca
2. Porifera
3. Coelenterata
4. Echinodermata

Ans: Echinodermata

2. Mesoglea is present in

1. Porifera
2. Coelenterata
3. Annelida
4. Arthropoda

Ans: Coelenterata

3. Which one of the following pairs is not a poikilothermic animal

1. Fishes and Amphibians
2. Amphibians and Aves
3. Aves and Mammals
4. Reptiles and mammals

Ans: Aves and Mammals

4. Identify the animal having four chambered heart

1. Lizard
2. Snake
3. Crocodile
4. Calotes

Ans: Snake

5. The animal without skull is

1. Acrania
2. Acephalia
3. Apteria
4. Acoelomate

Ans: Acrania

6. Hermaphrodite organisms are

1. Hydra, Tape worm, Earthworm, Amphioxus
2. Hydra, Tape worm, Earthworm, Ascidian
3. Hydra, Tape worm, Earthworm, Balanoglossus
4. Hydra, Tape worm, Ascaris, Earthworm

Ans: Hydra, Tape worm, Earthworm, Ascidian

7. Poikilothermic organisms are

1. Fish, Frog, lizard, man
2. Fish, Frog, lizard, cow
3. Fish, Frog, lizard, snake
4. Fish, Frog, lizard, crow

Ans: Fish, Frog, lizard, snake

8. Air sacs and Pneumatic bones are seen in

1. Fish
2. Frog
3. Bird
4. Bat

Ans: Bird

9. Excretory organ of tape worm is

1. Flame cells
2. Nephridia
3. Body surface
4. Solenocytes

Ans: Flame cells

10. Water vascular system is found in

1. Hydra
2. Earthworm
3. Starfish
4. Ascaris

Ans: Starfish

11. Tube like alimentary canal is found in

1. Hydra
2. Earth worm
3. Starfish
4. Ascaris

Ans: Ascaris

12. During ecdysis which of the following is shed off

1. Chitin
2. Mantle
3. Scales
4. Operculum

Ans: Chitin

13. Cephalization is related to

1. Head formation
2. Gut formation
3. Coelom formation
4. Gonad formation

Ans: Head formation

14. Which is not an insect?

1. Housefly
2. Bedbug
3. Mosquito
4. Spider

Ans: Spider

15. Dysentery is caused by

1. Entamoeba
2. Euglena
3. Plasmodium
4. Paramecium

Ans: Entamoeba

16. Which is not a feature of chordates

1. Green glands
2. Sweat glands
3. Sebaceous gland
4. Mammary gland

Ans: Green glands

17. The bilaterally symmetrical larvae which transform into radially symmetrical adult is

1. Bipinnaria
2. Trochophore
3. Tadpole
4. Polyp

Ans: Bipinnaria

18. Choose the correct terms related for Hemichordate

1. Vermiform, unsegmented, triploblastic, ciliary feeders
2. Vermiform, segmented, triploblastic, ciliary feeders
3. Vermiform, unsegmented, diploblastic, ciliary feeders
4. Vermiform, unsegmented, triploblastic, filter feeders

Ans: Vermiform, unsegmented, triploblastic, ciliary feeders

13. Crop, gizzard and air sacs are seen in

1. Fish
2. Frog
3. Bird
4. Bat

Ans: Bird

II. Fill in the blanks

1. The skeletal framework of porifera is _______

Ans: Spicules

2. Ctenidia are respiratory organs in _______

Ans: Mullusca

3. Skates are __________ fishes.

Ans: Cartilaginous

4. The larvae of an amphibian is _________

Ans: Tad pole

5. ___________ are jawless vertebrates.

Ans: Cyclostomes

6. __________ is the unique characteristic feature of mammal

Ans: Placenta

7. Spiny anteater is an example for _________ mammal.

Ans: egg laying.

8. The excretory opening of Porifera is __________

Ans: Osta or Osculum

9. The second largest phylum of animal kingdom is __________

Ans: Mollusca

10. In India National deworming day is observed on __________

Ans: February 10th in India

11. Myotomes are seen in ______________

Ans: Fishes

16. The larvae of an amphibian is ___________

Ans: Tadpole

17. In birds the air sacs communicate with __________

Ans: Bones

18. Placenta is the unique characteristic feature of ___________

Ans: Mammals

19. The binomial name of our National Bird is __________

Ans: Pavo Cristatus

20. Blue revolution is the rearing of ______________

Ans: Fishes and Prawns

21. In mammals testis are enclosed by __________

Ans: Scrotalsacs

III. State whether true or false:

1. Canal system is seen in coelenterates.

Ans: False

Correct Ans: Canal system is seen in porifera.

2. Hermaphrodite animals have both male and female sex organs.

Ans: True

3. Trachea are the respiratory organ of Annelida.

Ans: False

Correct Ans: Trachea are the respiratory organ of Arthopoda.

4. Bipinnaria is the larva of Mollusca 

Ans: False

Correct Ans: Bipinnaria is the larva of Echinodermata.

5. Balanoglossus is a ciliary feeder.

Ans: True

6. Fishes have two chambered heart.

Ans: True

7. Skin of reptilians are smooth and moist. 

Ans: False

Correct Ans: Skin of amphibians are smooth and moist.

8. Wings of birds are the modified forelimbs.

Ans: True

9. Female mammals have scrotal sacs.

Ans: True

10. Nephridia are the respiratory organ of Annelida.

Ans: False

IV. Match the following

V. Give very short answers:

1. Define taxonomy?

It is the theoretical study of classification including its basic principles, procedures and rules.

2. What is nematocyst?

The tentacles of coelenterates animals like hydra, jelly fishes, bear stinging cells are called nematocysts. They are helpful in defense and used for capturing the prey.

3. Why coelenterates are called diploblastic animals?

The body wall of coelenterats are made up of two layers outer extoderm and inner endoderm. Hence it is known as diploblastic animals.

4. List the respiratory organs of amphibians?

The respiratory organs of amphibians are gills, skin bucco- pharynx and lungs.

5. How does locomotion take place in starfish?

• Starfish locomotes with the help of tube feet
• It has two types of locomotion.
  1. Locomotion on a horizontal surface
  2. Locomotion on vertical surface

6. Are jellyfish and starfish similar to fishes? If no justify the answer.

• No, the two organisms belong to different category.
• Jelly fish belongs to the phylum Coelenterata.

7. Why are frogs said to be amphibians?

As frog lives both in the water and on land they are called as amphibians. The larva form of frog is aquatic.

8. Differentiate between tube feet and false feet?

9. What is Acrania?

The prochordates do not have a cranium or skull they are referred to as Acrania

Eg. Balanoglossus.

10. What are the sub-phylum of Prochordates?

The sub-phylum of prochordates are cephalochordate, hemichordate and urochordata.

11. What is the silver revolution?

Silver revolution is practice of raising poultry such as chickens, turkeys, ducks, geese as a sub category of husbandry for the purpose of farming meat or egg for food.

12. Which organism is called as friends of farmers? Why?

Earthworm is called as friends of farmers. By its bodily movements makes the soil loose and increases the water holding capacity and makes the soil ready for cultivation. The vermicast exreta of earthworm is a very good manure for the soil. Hence it is known as friends of farmer.

VI. Answer briefly.

1. Give an account on phylum Annelida?

They are metamerically segmented (repeated homologous organs in each segment)

• They have body cavity called coelom.
• The presence of movable bristles involved in locomotion are setae.
• Body is covered with outer moist cuticle providing protection
• Excretion is through nephridia,
• The central nervous sytem is composed of brain.
• The trochopore larva is a common larva of Annelida., (eg) earthworm, leach.

2. Differentiate between flat worms and round worms?

3. Outline the flow charts of Phylum Chordata.

4. List five characteristic features of fishes.

• Fishes are poikilothermic aquatic vertebrates with jaws.
• The body is streamlined.
• Locomotion is by paired and median fins.
• The body has a covering of scales.
• Body muscles are arranged into segments called myotomes.

5. Comment on the aquatic and terrestrial habits of amphibians.

Aquatic habits

• Skin is moist and glandular
• Respiration is through gills.

Terrestrial habits

• Long hind limbs for jumping
• Respiration is through lungs.

6. How are the limbs of the birds adapted for avian life?

The birds have two pairs of limbs, to accomodate the avian life.

1. The forelimbs are modified as wings.
2. The hind limbs are adapted for walking and running.

VII. Answer in detail.

1. Describe the characteristic features of different Prochordates.

a) Subphylum Hemichordata:

• They are the marine organisms without backbone.
• They are tubiculous forms.
• The body is soft vermiform, unsegmented, bilaterally symmetrical.
• They are triploblastic.
• The notochord is persistant as the stomochord in the anterior region of the animal.
• (Eg:) Balanoglossus.

b) Subphylum cephalochordata:

• They are small fish like marine chordates.
• They have unpaired dorsal fins.
• The persistent notochord extends forward beyond the brain.
• (Eg:) Amphioxus

c) Subphylum urochordata:

• The notochord is confined to the tail region of the larva.
• The adults are mostly degenerate and are sessile forms.
• The body is enveloped by a tunic or test.
• (Eg:) Asicidian.

2. Give an account on phylum Arthropoda.

Arthropod is an ancient and the largest Phylum with more number of species.

• The word Arthropod means jointed legs.
• The body of arthropods is divided into head thorax and abdomen.
• The exoskeleton is made up of chitin.
• The coelomic cavity is filled with haemolymph.
• They do not have well defined blood vessels.
• The insects used to shed its exoskeleton by moulting.
• The respiration is through book lungs. trachea
• Excretion is through malphigian tubules in insects and through green glands in crabs and prawns.

Eg. insects, spiders, crabs, shrimps, butterflies, millipedes, centipedes and scorpions etc.

VIII. Understand the assertion statements. Justify the reason given and choose the correct choice:

1. Assertion (A): The hydra is a diploblastic organism.
   Reason (R) : They have two germ layers.

1. A is correct and the R is wrong
2. R is correct and the A is wrong
3. Both A and R is correct
4. Both A and R is wrong

Ans: Both A and R is correct

2. Assertion (A) : The prochordates are grouped under Acrania.
    Reason (R) : They have well defined cranium.

1. A is correct and the R is wrong
2. R is correct and the A is wrong
3. Both A and R is correct
4. Both A and R is wrong

Ans: A is correct and the R is wrong

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