RBSE Solutions for Class 7 Science Chapter 8 Adaptations in Animals

by

RBSE Solutions for Class 7 Science Chapter 8 Adaptations in Animals are part of RBSE Solutions for Class 7 Science. Here we have given Rajasthan Board RBSE Class 7 Science Chapter 8 Adaptations in Animals.

Board RBSE
Textbook SIERT, Rajasthan
Class Class 7
Subject Science
Chapter Chapter 8
Chapter Name Adaptations in Animals
Number of Questions Solved 37
Category RBSE Solutions

Rajasthan Board RBSE Class 7 Science Chapter 8 Adaptations in Animals

Textbook Exercise

Multiple Choice Questions

Choose the correct option

Question 1.
Aquatic animals have adaptation
(a) Gills
(b) Scales
(c) Lay eggs
(d) All the above
Answer:
(d) All the above

Question 2.
State bird of Rajasthan
(a) Peacock
(b) Pigeon
(c) Great Indian Bustard
(d) Parrot
Answer:
(c) Great Indian Bustard

Question 3.
Which habitat has a characteristic of fat under skin and a layer of fur?
(a) Aquatic
(b) Desert
(c) Polar region
(d) all the above
Answer:
(c) Polar region

Fill in the blanks
1. The physical characteristic of living organism, which enables them to survive in particular environmental conditions is called …………. .
2. Bones of birds are and body is covered by……………. .
3. Aquatic animals have …………… on eyes.
Answer:
1. Adaptation
2. Hollow, Feathers
3. Nictating membrane

Short Answer Type Questions
Question 1.
What features are found in bird’s body, which with make them suitable for flying?
Answer:
Following features found in bird’s body make them suitable for flying:

  1. Body is light and streamlined.
  2. Hollow bones with air filled in it.
  3. Modifications of forelimbs into wings.
  4. Bird’s heart is very powerful. It provides blood, nutrition and oxygen to wings during flight.

Question 2.
What would happen if there was no cushioning in the camel’s foot?
Answer:
Due to cushions, camels foot do not stuck in the sand. It can move freely in sand. If cushions are not present, it makes difficult for camel to walk on sand.

Question 3.
If a thick layer of fat is not found under the skin of the polar beer then what will be the effect on it?
Answer:
In polar areas, most of the times, land is covered with ice. Here, its very cold. The thick fat layer present beneath the skin protect it from cold. If this thick layer is absent, then it would be difficult for beers to survive in polar regions.

Long Answer Type Questions
Question 1.
What is the difference between terrestrial and aquatic organisms?
Answer:

Aquatic adaptations Terrestrial adaptations
1. Aquatic habitats include rivers, ponds, lakes, streams etc. Terrestrial habitats include graslands, mountains, deserts etc.
2. Aquatic animals generally use oxygen dissolved in water. These use gaseous oxygen.
3. Respiration takes place by gills. Respiration takes place by lungs.
4. Scales are found on the skin Many adaptations takes place on skin.
5. Air sacs are present. Air sacs may or may not be present.
6. Body is generally streamlined. Body is of different shapes.

Question 2.
What characteristics are found in camel which adapts it for desert habitat?
Answer:
Camel has following characteristics which adapts it for desert habitat:

  1. It has broad, flat, pads at the bottom of their hooves. For this reason,it can move freely in sand.
  2. After taking much water, it can live without water for many days.
  3. Its urine is thick and skin is also thick which helps it to excrete less water in the form of sweat or urine.
  4. Its stool is also very hard and dry.
  5. Fat is stored in its hump. When required, decomposition of fats takes place which produces water. It fulfils the demand of water for some days.

Intext Questions

Question 1.
What these diverse environmental conditions, physical strucures and behaviour of living organisms will be the same? (page 76)
Answer:
The physical structure and behaviour of organisms living in these diverse environmental conditions are not uniform.

Question 2.
Fish dies after sometime when it is taken out of water. Have you ever think why? (page 76)
Answer:
Fish is adapted to live in water. It respires through gills. When it is taken out of water, it cannot respire and dies.

Question 3.
Name of some habitats are following: Normal habited, desert, terrestrial orial, aquatic, polar. Write the name of animals found in your area in front of respective habitat. (page 77)
Answer:

Name of Habitat Name of animals
1. Normal habitat Horse, Goat, Lion, Cow
2. Desert Camel, Giraffe, Snake,
3. Terrestrial Arial Pigeon, Vulture, Eagle, Crow
4. Aquatic Fish, Octopus, Pila, Oyster
5. Polar Beer, Yak, Musk, Ox, Reindeer

Question 4.
Have you ever thought how the birds fly in the sky? What are the physical chaeacterstics by which they can fly in the sky and we can’t? (Page 80)
Answer:

  1. Their forelimbs are modified into wings.
  2. Their body is lighter and the mouth, but then- beak is rigid and strong, they eat insects by comfortably holding it.
  3. Finally we can say that the body of birds is lighter and streamlihed, that helps in flying using wings.

Activity

1. Observe your nearby animals. Prepare a table of adaptations found in them on a chart and fix it in your classroom.

Name of organism Adaptation
1. Pigeon 1. Forelimbs are modified into feathers which helps in flying.
2. Can walk on two legs.
3. Streamlined body when flying.
4. Can collect food with the help of peak.
2. Lizard 1. Body is light and small.
2. Legs has pads which helps to climb walls.
3. Catch insects as food.
4. It can detach tail to protect from prey.
3. Fish 1. Can swim in water easily,
2. Have fins for swimming.
3. Body is streamlined.
4. Gills are present for respiration.
4. Dog 1. Omnivorous
2. Can prey if required
3. Have strong teeth to tear flesh
4. can run fast.

Question 2.
Observe aquatic and terrestrial plants and animals and discuss their characteristics.
Answer:
Students observe aquatic and terrestrial plants and animals and discuss.

Question 3.
Observe different types of insects shape, colour etc found on trees.
Answer:
Observation:

  1. Grasshopper: Three pair of legs, green colour, antennae on head, red eyes, long body.
  2. Butterfly: Three pair of legs, different colours, long trump, small body, big feathers.
  3. Bee: Three pair of legs, yellow colour, poisonous sting on the back side of body, small body, segmented.
  4. Lady bird: Three pair of legs, circular shape, red colour having back spots.
  5. Mantis: Three pair of legs, antennae on head, long wings, green colour, long and slim body.
  6. Aphid: Three pair of legs, green colour, small eyes, body oval shaped.

Question 4.
Prepare a chart ofbeaks of birds found around.
Answer:
RBSE Solutions for Class 7 Science Chapter 8 Adaptations in Animals 1
Question 5.
Prepare a scrap book of pictures of adaptation (animals and plants).
Answer:
Students do it by themselves.

Other Important Questions

Multiple Choice Questions
Question 1.
Fish is a
(a) aquatic animal
(b) amphibians
(c) Terrestrial animal
(d) flying animal
Answer:
(a) aquatic animal

Question 2.
The adaptations which help fish to swim in water is
(a) presence of gills
(b) presence of scales
(c) air sacs
(d) Nictating membrane
Answer:
(c) air sacs

Question 3.
In fish, the organs present for speed is
(a) fins
(b) legs
(c) Scales
(d) founatain
Answer:
(a) fins

Question 4.
Ship of Desert is
(a) Camel
(b) Horse
(c) Ox
(d) Wild rat
Answer:
(a) Camel

Fill in the blanks
1. Fish cannot live without …………… .
2. In aquatic animals, respiration takes place through ………….. .
3. The ……………. of Giraffe is adapted to eat food from trees at height.
4. The Camel is known as ………………. of desert.
5. Forelimbs of birds transformed into …………….
Answer:
1. Water
2. Gills
3. Neck
4. Ship
5. Feathers

Very Short Answer Type Questions
Question 1.
What do you understand by adaptation?
Answer:
The physical characteristics of living organisms which enables them to survive in particular environmental conditions is called adaptation.

Question 2.
Write the name of two aquatic animals.
Answer:
Whale and Dolphin.

Question 3.
How are eyes of fishes protected from water?
Answer:
Nictating membrane is present on the eyes of fishes which protect them from water.

Question 4.
Why is tail present in monkeys?
Answer:
Tail of monkeys helps them to climb trees, to balance and to hold branches firmly.

Question 5.
What adaptations are found in giraffe to reach food from trees at height?
Answer:
Long fore legs and long neck are adaptations found in camel.

Question 6.
Write the name of two desert animals.
Answer:
Camel and wild rat.

Question 7.
Which is our national bird?
Answer:
Peacock.

Short Answer Type Questions
Questions 1.
How many regions are found on earth on the basis of environmental conditions?
Answer:

  1. Excessive heat (desert)
  2. Extremely cold regions (Polar and Tundra)
  3. Regions of normal atmospheric conditions
  4. sweet and brackish water areas etc.

Question 2.
What is desert habitat? Which type of animals can survive in such habitat? Give examples.
Answer:
The desert atmosphere includes dried areas of high temperature. Number of species of animals found in it is also very less. In this habitat only those animals can survive which bear extreme temperatures and scarcity of water. Most animals living in dais habitat make burrows in the land such as lizards, snakes, wild rats etc.

Question 3.
Write four characteristics of animals living in desert habitat.
Answer:

  1. Their skin is light brown in colour.
  2. Their skin is thick, smooth and dry.
  3. Very less sweat is released from body.
  4. Most animals are nocturnal which save them from the heat of the day.

Long Answer Type Questions
Question 1.
Write the adaptations found in aquatic animals.
Answer:
Adaptation in aquatic animals: For respiration, aquatic animals get necessary oxygen from the water. These animals depend on aquatic plants and animals for food. Example, fish, pila, snails, they have following characteristics in their physical and internal structure. These characteristics are called as adaptations. Such as:

  1. Aquatic animals have gills for respiration.
  2. They possess scales or shell on their body.
  3. Aquatic animals have air sac in the body which helps in living and swimming in water.
  4. Eyes have a nictating membrane to protect it from water.
  5. They have fins for movement or swimming.

Question 2.
Write the adaptations found in normal terrestrial habitat with examples.
Answer:
Habitat of normal environmental conditions on the earth is called normal terrestrial habitat. The following are the characteristics of the animals found in this type of habitat:

  1. They have legs for movement such as horse, deer, cows etc. But many animals do not have legs, but their body is muscular, which allows them to creep on the ground such as snakes.
  2. A long tail found in monkeys is helpful in climbing on the trees, maintaining balance and provide grip on branches,
  3. Giant animals such as elephants due to their heavy body and short neck cannot easily bend, therefore, it could not hold food by forelimbs hence it uses its long proboscis for breaking leaves and branches, pick up food from the land and protect it from enemies.
  4. Giraffe’s neck is adapted to get its food from tall trees.
  5. Carnivorous animals such as Lion, cat, leopard etc. have more developed canine teeth in mouth to tear prey.
  6. Deer, hare, niglai, horse etc., have well developed incisors to chew food.

Question 3.
Write the adaptations found in polar and cold habitats.
Answer:
In polar region, most of the time the ground is covered with snow. These regions have extremely low temperatures and the weather is dry. This type of habitat is found in Polar Regions, on high mountains and Plateaus. This is also called cold desert. Low vegetation is found in Polar Regions. Hence less number of animals are found there. The animals found in these areas are rabbits, bear, Musk ox, reindeer, mountain goat etc. These animals have thick fur on the boys and a thick layer of fat under the skin, which prevents them from cold. Animals in this region is very less so it is a safe area. That’s why penguin makes their home in these areas during their breeding season.

Question 4.
Write the adaptation in animals flying in air.
Answer:
This category includes those animals which can fly in the air as well as live on the land. Following adaptations are found in flying animals:

  1. Their forelimbs are modified into wings.
  2. Their body is lighter and the boat shape so that can fly in the air easily.
  3. Birds have no teeth in the mouth, but their beak is rigid and strong, they eat insects by comfortably holding it
  4. Their bones are hollow and the air is filled in hollow cavity of bone, which makes their body lighter.
  5. Its body is covered with feathers.
  6. Bird’s heart is very powerful. It provides blood, nutrition and oxygen to wings during flight.

We hope the RBSE Solutions for Class 8 Science Chapter 8 Adaptations in Animals will help you. If you have any query regarding Rajasthan Board RBSE Class 8 Science Chapter 8 Adaptations in Animals, drop a comment below and we will get back to you at the earliest