a) crocodile-scales
b) snail-shell
c) sheep-fur
d) crow-feathers
Time to answer
1. Pigeons respire through lungs.
2.frogs breathe through their lungs on land and respire through moist when underwater.
3.prawns can respire through gills.
4.Ants have peculiar type of respiratory organ known as spiracles.
Complete the following.
1.cockroach: crawl ::Housefly: fly
2.water boatman: paddle and swim ::stick insect :: Hops
3.Turtle : flipper :: Fish: fins
4.crow : Fly :: Ostrich: cannot fly
Let us practice
1.Multiple - choice questions (MCQs)
Tick (√) the correct option.
a) In which of the following animals are webbed feet an adaptation?
Ans. Aqatic animals
b) which of the following statement is true?
Ans. All of these
c) In birds, the wings are modified.
Ans. Forelimbs
d) which of the following is not an aquatic habitat?
Ans. Deserts
e) Animals migrate
Ans. All of the above
2. Fill in the blanks.
a) Fish use fins for swimming.
b) The water boatman uses its legs as paddle.
c) carnivores have sharp, pointed canine teeth for tearing flesh.
d) snakes are limbless reptiles.
e) Turtle have four paddle - like limbs called flippers for movement.
3. Match the following.
a )greater flamingo - migrates in winters
b) Turtle - use flippers for swimming
c) grasshopper- use their long hindlimbs for hopping
d) snake - reptiles without legs
e) Tortoise - covered with hard shell
4. Read the following two statements and choose the correct option.
Statement 1- the frog is an amphibian.
Statement 2- Amphibians live both on land and in water.
Ans. a) Both statement s 1&2 are correct.
a) what are omnivores? Give three examples.
A. Omnivores are animal which eat flesh as well as green plants.
Example. Man, bear, crows
b) How does a snake move?
A. Snakes are limbless reptiles. They crawl with scales or plates.
c) why do animals migrate from one place to another?
A. Animals migrate from one place to another to avoid bad weather, find food and shelter and return to their breeding ground.
d) how do insects move?
A. All insects have 6 legs that they use to move around generally they crawl an their legs.
e) How does the body covering of a snail help it in protecting itself?
A . The shell of snail is made up of calcium carbonate which protect them during danger situation.
a) how many types of body coverings are found in animals? Write short notes on them along with examples.
A. Scales:- The body of snakes, crocodile and lizerds is covers with scales which prevent water loss from their body.
Shell:- The body of animals like tortoise, snail & turtle is covered with hard shell of calcium carbonate which protects them in danger situation.
Fur:- The body of animals such as sheep & bear is covered with fur that protects them from cold & rain.
Feathers:- body of birds is covered with feathers which help them in their flight. Feathers also keep their body light & protect from cold.
b) How do fishes breathe? Explain.
A. Fishes breathe through their gills. If you watch a fish carefully bit open & close it's mouth continuously a fish takes in water through its gills. During this process, oxygen dissolved in water is absorbed & carbon dioxide from blood is released into water.
c) Describe the feathers that help a bird to fly.
A. Birds fly with their wings. Which are actually their forclimebs. Wings have feathers & are attached to breastbone of birds. Bones of birds are hollow making their bodies light & their streamlined body makes it easy for them to fly high in air.
d) what is migration? Why do animals or birds migrate?
A. At certain times of the year some animals travel long distances in very large groups, migration means mass movement of animals of animals from one location to another. Animals migrate yo avoid bad weather find food & shelter & return to their breading grounds, where they can safely give birth to young ones. Every year inbwinter, some birds such as siberian crane & great flamingo migrate to India.
Comments
Post a Comment