Multiple Choice Questions
Question 1
Identify the aquatic animal with scaly skin which breathe with gills:
- Rohu
- Tortoise
- Sparrow
- Rat
Answer
Rohu
Reason — Rohu is a fish.
Question 2
Identify the bird which can fly:
- Peacock
- House sparrow
- Ostrich
- Penguin
Answer
House sparrow
Reason — Peacock, Ostrich and Penguin are flightless birds.
Question 3
Identify the animal which is not an Arthropod:
- Prawn
- Butterfly
- Earthworm
- Spider
Answer
Earthworm
Reason — Earthworm is classified under Annelids.
Short Answer Questions
Question 1
Give two examples of each of the following:
(i) Amphibians (ii) Segmented worms (iii) Reptiles (iv) Coelenterates (v) Arthropods (vi) Flatworms
Answer
(i) Amphibians — Frog, Toad
(ii) Segmented worms — Earthworm, Leech
(iii) Reptiles — Lizard, Snake
(iv) Coelenterates — Hydra, Jellyfish
(v) Arthropods — Prawn, Ant
(vi) Flatworms — Tapeworm, Liverfluke
Question 2
Give names of two animals which are found as parasites inside the human intestine.
Answer
Two animals which are found as parasites inside the human intestine are Tapeworm and Roundworm.
Question 3
Name one example each of an animal which shows the following characteristics:
(i) Fixed animal with a pore-bearing body (ii) Star-shaped body (iii) Can live in water as well as on land (iv) Has a flattened ribbon-like body
Answer
(i) Fixed animal with a pore-bearing body — Sponge
(ii) Star-shaped body — Starfish
(iii) Can live in water as well as on land — Frog
(iv) Has a flattened ribbon-like body — Tapeworm
Question 4(i)
Write one difference between Porifera and Coelenterata.
Answer
| Porifera | Coelenterata |
|---|---|
| Body is porous, i.e., bear many tiny pores to draw water into the body cavity and one large pore to pass it out. | The body is radially symmetrical i.e., the body can be divided into two identical halves along any plane. |
Question 4(ii)
Write one difference between Arthropoda and Mollusca.
Answer
| Arthropoda | Mollusca |
|---|---|
| Their body is divided into three regions — head, thorax and abdomen. | Their body is soft and unsegmented. |
Question 4(iii)
Write one difference between Invertebrates and Vertebrates.
Answer
| Invertebrates | Vertebrates |
|---|---|
| The animals that do not have a back bone are called invertebrates. | The animals that have a back bone are called vertebrates. |
Question 4(iv)
Write one difference between Platyhelminthes and Nematoda.
Answer
| Platyhelminthes | Nematoda |
|---|---|
| Their body is thin and flat. | Their body is rounded and unsegmented. |
Question 5
Match the animals given under column A with their respective classification group given under column B.
| Sl. No. | Column A | Column B |
|---|---|---|
| 1. | Sponge | Amphibia |
| 2. | Snail | Reptilia |
| 3. | Butterfly | Echinodermata |
| 4. | Toad | Mollusca |
| 5. | Lizard | Arthropoda |
| 6. | Starfish | Porifera |
Answer
| Sl. No. | Column A | Column B |
|---|---|---|
| 1. | Sponge | Porifera |
| 2. | Snail | Mollusca |
| 3. | Butterfly | Arthropoda |
| 4. | Toad | Amphibia |
| 5. | Lizard | Reptile |
| 6. | Starfish | Echinodermata |
Question 6
Write the characteristics of class Aves with reference to their body covering and jaws.
Answer
Following are the characteristics of class Aves with reference to their body covering and jaws:
- Body is covered with feathers.
- Jaws are provided with horny beak but have no teeth.
Question 7
Categorise the following animals under their appropriate columns of classification:
Dog, Grasshopper, Rat, Scorpion, Toad, Butterfly, Lizard, Turtle, Frog, Bat, Snail, Honey bee, Pigeon, Liverfluke, Leech, Cattle, Snake, Rohu, Parrot, Ascaris, Earthworm, Cow, Rabbit, Monkey, Elephant
Answer
Worms
- Earthworm
- Leech
- Liver fluke
- Ascaris
Molluscs
- Snail
Fishes
- Rohu
Amphibians
- Toad
- Frog
Reptiles
- Lizard
- Snake
- Turtle
Birds
- Pigeon
- Parrot
Mammals
- Rat
- Bat
- Cattle
- Rabbit
- Monkey
- Elephant
- Dog
- Cow
Arthropods
- Grasshopper
- Butterfly
- Honey bee
- Scorpion
Question 8
Give three characteristic features of Amphibians which help to differentiate them from fishes.
Answer
Three characteristic features of Amphibians which help to differentiate them from fishes are:
- They can live in water as well as on land.
- They breathe through lungs and skin.
- Body is covered by a slimy and slippery skin
Question 9
Why fishes are said to have a streamlined body? Name their respiratory organs.
Answer
The fishes have streamlined body which means that their body is narrow at both ends. This helps them to swim by minimizing the resistance of water.
The respiratory organ of fish is gills.
Question 10
Why Arthropods have been given this name? Name the four classes of phylum Arthropods giving one example each of the four classes.
Answer
The word 'Arthropod' has been derived from Greek words arthron and podos which means 'joint' and 'leg' respectively. The Arthropods have been given this name because they have jointed legs.
The four classes of phylum Arthropods are:
- Crustacea— Example: Crab
- Myriapoda— Example: Centipede
- Insecta— Example: Housefly
- Arachnida— Example: Spider
Question 11
Give two characteristic features of birds which enable them to fly. Name any two birds which cannot fly.
Answer
Two characteristic features of birds which enable them to fly are:
- Their bones are hollow and light which make their body light.
- They have wings to fly.
Two birds which cannot fly are Ostrich and Kiwi.
Question 12
Differentiate between flatworms and roundworms.
Answer
| Sl. No. | Flatworms | Roundworms |
|---|---|---|
| 1. | Flatworms have thin and flattened body. | Roundworms have rounded and unsegmented body. |
| 2. | Flatworms belong to the phylum Platyhelminthes. | Roundworms belong to the phylum Nematoda. |
Question 13
Animals cannot prepare their own food. What scientific name is given to such organisms.
Answer
The scientific name for such organisms is Heterotrophs.