NCERT Exemplar Problem Class 6 Science The Living Organisms and their Surroundings

Here in this post we provided NCERT Exemplar Problem Class 6 Science The Living Organisms and their Surroundings Chapter 9 Full Explanation by group of Science Experts. We have provided here each questions answer with reason behind the answer.

Hope it help you!

The Living Organisms and their Surroundings Class 6 Exemplar full Explanation:

  • Multiple Choice Questions

1) Which of the following cannot be called a habitat?

a) A desert with camels

b) A pond with fishes

c) A jungle with wild animals

d) Cultivated land with grazing cattle.

Answer:-d) Cultivated land with grazing cattle.

Cultivated lands are for farming purpose. Grazing cattle does not live over there, they come there in the search of food.

2) Following are same features of plants

I) They lose a lot of water through transpiration

II) Their leaves are always board and flat.

III) They lose very little water through transpiration.

IV) Their roots grow very deep into the soil.

Which of the combination of above features are typical of desert plants?

a) I) and II)

b) II) and IV)

c) II) and III)

d) III) and IV)

Answer:-  d) III) and IV)

Desert climate is hot and there shortage of water. Thus the plants have adapted the features of small leaves or spines for the reduction of loss of water through transpiration, and roots grow very deep so that to reach the moist soil.

3) Boojho comes across an animal having a stream- lined and slippery body. What is the habitat of the animal?

a) Water

b) Desert

c) Grassland

d) Mountain

Answer:-  a) water

Streamlined body helps animals to live in water habitat. It helps in swimming.

4) Which of the following are characteristic of living beings?

I) Respiration

II) Reproduction

III) Adaptation

IV) Excretion

Choose the correct answer from the options below:-

a) I, II and IV only

b) I and II only

c) II and IV only

d) I , II , III and IV

Answer:- d) I, II, III and IV

Human beings can perform all the vital activities like Respiration, Reproduction and excretion. They can also adapted according to climate and surrounding atmosphere.

5) Earthworms breath through their

a) Skin

b) Gills

c) Lungs

d) Stomata

Answer:- a) skin

Earthworms don’t have gills, lungs or stomata. They respire through their skin.

6) Which of the following is not an example of response to stimulus?

a) Watering in mouth where we see delicious food items.

b) Closing of leaves of mimosa plant when touched.

c) Shutting our eyes when an object is suddenly thrown in our direction.

d) A Chick hatching out of an egg.

Answer:-.D) A thick hatching out of an egg.

Stimulus is the sudden response or change occurs on a certain things happens. A chick hatching out of an egg is not a sudden change.

7) Which of the following is correct for respiration in plants?.

a) Respiration takes place only during day time.

b) Respiration takes place only during night.

c) Respiration takes place both during day and night.

d) Respiration takes place only when plants are not making food.

Answer:-  c) Respiration takes place both during day and night.

Respiration is an important process thus it takes place during both day and night.

8) Which of the following is an incorrect statement about excretion?

a) Excretion takes place in plants.

b) Excretion takes place both in plants and animals.

c) Excretion is the process of getting rid of excess water only.

d) Secretion is one method of excretion.

Answer:- c) Excretion is the process of getting rid of excess water only.

Excretion is the process in which unwanted waste  along with the water is passed out of body.

9) Choose the set that represents only the biotic components of a habitat.

a) Tiger, Deer, grass , soil

b) Rocks, soil, plants, air

c) Sand, turtle, crab, rocks

d) Aquatic plant, fish , frog, insect

Answer:- d) Aquatic plant, fish, frog, insect

Aquatic plants, fish, frog, insect these all represent the biotic components of the habitat. Because biotic components shows the plants , animals and microorganisms. That is all living organisms are biotic.

10) Which of the following is not associated with reproduction?

a) A new leaf coming out of a tree branch.

b) A dog giving birth to puppy.

c) A seed growing Into a plant.

d) Chick hatching from an egg.

Answer:- a) A new leaf coming out of a tree branch.

Leaf is not the Reproduction of the plant. It is a part of plant. It does not shows the increase in the number of plants.

11) Choose the odd one out from below with respect to reproduction.

a) Eggs of hen

b) Seeds of plants

c) Buds of potato

d) Roots of mango tree

Answer:- d) Roots of mango tree.

Eggs of hen, seeds of plants , buds of potato are reproductive parts of the respective things. But roots of mango tree does not perform the function of reproduction.

12) Although organisms die, their kind continue to live on earth. Which characteristics of living organisms makes this possible?

a) Respiration

b) Reproduction

c) Excretion

d) Movement

Answer:- b) Reproduction

Reproduction is an important thing in living organisms which is carried out for the survival of the specific species for the longer time on the earth.

13) If you happen to go to a desert, what changes do you expect to observe in the urine you excrete? You would

I) Excrete small amount of urine

II) Excrete large amount of urine

III) Excrete concentrated urine.

IV) Excrete very dilute urine.

Which of the above would hold true?

a) I and III

b) II and IV

c) I and IV

d) I and II

Answer:- a) I and III

Desert have hotter climate, so the body needs more water. And thus our body will excretes small amount of concentrated urine.

  • Very Short Answer Questions

14) Unscramble the given words below to get the correct word using the clues given against them.

a) SATPADAOINT → specific features or certain habits which enables a living being to live in its surroundings

Answer:-ADAPTATION

b) RETECOXNI → waste products are removed by this process

Answer:-EXCRETION

c) LUMISIT→ all living things respond to these

Answer:- STIMULI

d) ROUCDPRENTOI → because of this we find organisms of the same kind.

Answer:-  REPRODUCTION

15) Using the following words, write the habitat of each animal given in figure 9.1 (a to d)

GRASSLAND, MOUNTAIN, DESERT, POND, RIVER

A) Grassland

B) pond, river

C) Mountain

D) Desert

16) Classify the following habitats into terrestrial and aquatic types.

Grassland, pond, ocean, rice field

Answer:-

Terrestrial habitats – grassland, rice field

Aquatic habitats–pond, ocean

17) Why is reproduction important for organisms?

Answer:-

There is huge Verity in the living organisms, but all the living organisms show some common characteristics And all the living organisms die. Because All the living organisms die, the particular type of organisms can survive over the hundreds of years only if they perform reproduction of their own kind. The specific type of organisms can exist only if they reproduce. Reproduction leads to the formation of more individuals of same kind and increase their number.  Therefore the reproduction is important for organisms.

18) Fill in the blanks :-

a) Saline water, hot air and sand are ____________ components of a habitat.

Answer:-  Saline water, hot air and sand are abiotic components of a habitat.

b) The habitat of plants and animals that live in ___________ is called the aquatic habitat.

Answer:-  The habitat of plants and animals that live in water is called the aquatic habitat.

c) ____________ enable a plant or an animal to live in its surrounding.

Answer:-  Adaptations enable a plant or an animal to live in its surrounding.

d) Plants and animals that live on land are said to live in ___________ habitats.

Answer:-  Plants and Animals that live on land are said to live in terrestrial habitats.

  • Short Answer Questions

19) Paheli has a rose plant in her garden how can she increase the number of rose plants in the garden?

Answer:- Rose plants can be reproduced from the stem cutting. One small stem cutting of any rose plant can be planted in soil and taking proper care of it we can grow a new plant from that. To increase the number of rose plant in the garden paheli should do the same.

20) Why do desert snakes burrow deep into the sand during the day?

Answer:- Desert have shortage of water. Water is not available over there also the sand present on the surface of desert does not hold the water . The deeper layers of the soil are slightly moist and cooler than the upper surface. It gets more hot in the day time, Thus the snakes and other animals present in the desert burrow deep into the soil.

21) Write the adaptation in aquatic plants due to which

a) Submerged leaves can bend in the floating water.

Answer:- Adaptation of aquatic plant is that, the plants have thin ribbon like and narrow leaves which are submerged and can bend in the glowing water.

b) Leaves can float on the surface of water.

Answer:- Adaptation for the aquatic plants, that their leaves can float over the water surface is, the plants have long , hollow and light stem. Stems grow up to the surface of water and thus the leaves and flowers float on the water.

22) Mention one adaptation present in the following animals:-

a) In Camels to keep their bodies away from the heat of sand.

Answer:-   camels are adapted with longlegs to keep their bodies away from the heat of sand.

b) In frogs to enable them to swim.

Answer:- Adaptation of frog to enable for swimming is webbed feet.

c) In dolphins and whales to breathe in air when they swim near the surface of water.

Answer:- dolphins and whales are adapted with the blow holes for the breathing air when they swim near water.

23) Some desert plants have very small leaves whereas some others have only spines. How does this benefit the plants?

Answer:-

Desert is the habitat where there is so much shortage of water.

Due to these, Shortage of water, Soil (sand ) cannot hold water in that, and the hotter climate present over there,

The animals and plants in that habitat have adapted some specific adaptations.

As there is so much temperature in the day time so plants perform the function of transpiration to keep plant cool. And therefore the plants given out the water from the leaves. But there is shortage of water so desert plants have adapted the features that their leaves are mostly absent, or very small, or in the form of spines. This feature helps plant in the reduction of water from leaves through Transpiration.

24) What are the specific features present in a deer that helps it to detect the presence of predator like lion?

Answer:-

Lion and deer both lives in the habitat like grassland or forest. Lion can kill the animals like deer. Deer is prey for the predators like lion. So they have adapted the features like,

Long ears –  for listening the movements of predictors like lion.

Eyes present on the side of head –  it helps to look in all directions for precautions.

Long and lean legs– these helps them to run away speedily from the predators.

25) Read the features of plants given below:-

Choose the type of plant for every features given in a, b, c, d, e, and f from the list given below.

Aquatic plant, desert plant, mountainous plant.

a) Thick waxy stem

Answer:- Desert plant

b) Short roots

Answer:- aquatic plant

c) Cone shaped plants

Answer:-Mountainous plants

d) Sloping branches

Answer:- mountainous plant

e) Small or spine – like leaves

Answer:- Desert plant

f) Hollow stem

Answer:- Aquatic plants

  • Long Answer Questions

26) Like many animals although a car also moves it is not considered as a living organism. Give 2-3 reasons.

Answer:-

Animals are living organisms they move by their own, do all their vital activities like respiration, excretion, eating food etc.

But car don’t perform other activities like respiration, excretion, reproduction and growth which shows it is non – living thing.

Also car cannot move by its own it moves with help of burning fuels like diesel and petrol.

27) What are the adaptive features of a lion that helps it in hunting?

Answer:-

Lion is a animal which lives in the habitat like grassland and forest. It is a predictor which hunts or kills the prey, small animals like deer, cow, buffaloes , etc.

Thus lion have adapted some features to catch and hunt the preys. It has brown coloured body which helps it to hide in dry land, for detecting of the preys.

Their eyes are on the front of the head, that they should know the exact location and movement of the prey.

They have strong paws and long claws which help them to catch tightly the prey and kills them.

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