CBSE Important Questions Class 6 Science Chapter 2 – Diversity in the Living World
Class 6 Science Chapter 2 Diversity in the Living World is part of the new NCERT textbook Curiosity. It shows students how many different kinds of plants and animals live around us and how each one is suited to its home, called its habitat. Students learn to group plants as herbs, shrubs, trees, climbers and creepers, to look at the veins in a leaf (venation) and the type of roots, and to see how animals such as the camel are adapted to live in hot and cold deserts.
These CBSE important questions for Class 6 Science Chapter 2 cover the adaptations of camels in the Thar Desert and in Ladakh, how a cactus survives in the desert, why creepers spread on the ground, the link between leaf venation and root type, and the difference between monocot and dicot plants. Every question has a clear step-by-step answer in simple English, so students can practise on their own, parents can check the working, and teachers can use them for class tests. A free printable PDF of these important questions is also available on this page.
Q1. A camel is a fascinating animal that has adapted remarkably well to live in the harsh climatic conditions of the desert. It exhibits long legs with wide hooves. It stores food in its humps, and it can survive for many days without drinking water.
a. Describe two physical adaptations that help camels survive in the desert.
b. Explain how camels manage their water intake in the desert.
c. Discuss the significance of the hump of a camel.
Answer: a. Two physical adaptations of camels for desert life are:
1. Long legs, which keep the body away from the hot ground.
2. Flat feet with wide hooves, which stop the camel from sinking into the sand.
b. Camels can go without drinking water for a long time, sometimes up to two weeks. They lose very little water because they pass only a small amount of urine, their dung is dry, and they do not sweat.
c. The hump stores food in the form of fat. When food is scarce, the body changes this stored fat into energy, so the camel can go for many days without eating.
Q2. Observe the given image and answer the following questions.
a. What is the purpose of a camel's hump?
b. How do a camel's long legs help it survive in the desert?
c. List the special ways by which a camel saves water.
Answer: a. The hump stores fat. When there is no food, the fat is changed into energy to keep the camel going.
b. The long legs keep the camel's body high above the hot sand, so it is protected from the heat of the ground.
c. A camel saves water by producing very dry dung and only a small amount of thick urine. It also does not sweat much. In this way it loses very little water and can live where water is scarce.
Q3. From the scorching sands of the Thar Desert to the icy wastes of Ladakh, camels face a daunting range of temperatures. Given these extreme differences, explain how the different physical adaptations of camels help them survive in these contrasting environments.
Answer: Camels of the hot desert of Rajasthan have long legs to keep the body away from the hot sand, wide hooves so that they do not sink, and a hump that stores fat for energy.
Camels of the cold desert of Ladakh have shorter legs to walk on rocky and uneven ground, a thick coat of fur to keep them warm, and they eat snow to get water.
Q4. a. Which animal exhibits the following adaptations to survive in its habitat?
(i) Long eyelashes and thick eyebrows
(ii) Big, wide feet and fat stored in the hump
(iii) Closable nostrils and covered ears
b. With the help of the given features, identify the habitat of this animal.
c. Give an example of a plant belonging to this habitat and mention the features that help it survive there.
Answer: a. These are the adaptations of a camel.
b. A camel with these features lives in a hot desert. The long eyelashes, thick eyebrows, closable nostrils and covered ears keep sand out during sandstorms.
c. The cactus is a plant of the desert. It has a thick, fleshy green stem that stores water and makes food, and its leaves are changed into thorns, which reduce the loss of water.
Q5. Give any three adaptations that help a camel survive in a cold desert.
Answer: 1. Thick fur coat: The fur traps heat and keeps the camel warm on cold desert nights.
2. Hump: The hump stores fat. When food is scarce the fat gives energy, and it also helps the camel stay warm.
3. Long legs: The legs keep the body away from the cold ground at night and help the camel walk long distances to find food and water.
Q6. Read the assertion and reason carefully and choose the correct option.
Assertion (A): Creepers spread on the ground.
Reason (R): Their stems are weak.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) Both A and R are false.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Creepers such as pumpkin and watermelon do spread along the ground, so A is true. They cannot stand upright because their stems are weak, so R is true and it is the reason why creepers spread on the ground.
Q7. What type of root system is found in plants having parallel venation?
(a) Fibrous root
(b) Adventitious root
(c) Taproot
(d) Stilt root
Answer: (a) Fibrous root
Venation is the pattern of veins in a leaf. Plants whose leaves have parallel veins, such as grass, wheat and maize, have fibrous roots, which are many thin roots of about the same size growing from the base of the stem.
Q8. What type of root system is found in plants having leaves with reticulate venation?
(a) Fibrous roots
(b) Supporting roots
(c) Tap root
(d) Aerial roots
Answer: (c) Tap root
In reticulate venation the veins form a net-like pattern, as in mango, tulsi and mustard leaves. Such plants have a tap root system, with one main root growing straight down and smaller side roots coming out of it.
Q9. What type of venation and root system is found in the maize plant?
(a) Reticulate venation and tap root
(b) Reticulate venation and fibrous root
(c) Parallel venation and fibrous root
(d) Parallel venation and tap root
Answer: (c) Parallel venation and fibrous root
Maize leaves have veins running parallel to each other, and a maize plant has fibrous roots. Plants with parallel venation always have fibrous roots.
Q10. In which root system does the main root grow vertically downwards, giving out lateral roots?
(a) Fibrous root system
(b) Adventitious root system
(c) Taproot system
(d) Stilt root system
Answer: (c) Taproot system
In a taproot system, such as in a carrot or radish, one thick main root grows straight down into the soil and thinner side roots, called lateral roots, branch out from it.
Q11. Which of the following options correctly gives the information of a particular plant?
(a) Coriander: Parallel venation, fibrous roots
(b) Mango: Parallel venation, fibrous roots
(c) Tulsi: Reticulate venation, tap roots
(d) Wheat: Reticulate venation, tap roots
Answer: (c) Tulsi: Reticulate venation, tap roots
Tulsi leaves have net-like (reticulate) veins and the plant has a tap root. Coriander and mango also have reticulate venation with tap roots, so options (a) and (b) are wrong. Wheat has parallel venation with fibrous roots, so option (d) is wrong.
Q12. Which of the following characteristics is used to distinguish monocots from dicots?
(a) Dicots have parallel venation while monocots have reticulate venation.
(b) Monocots have fibrous roots, while dicots have taproots.
(c) Monocot seeds have two cotyledons while dicot seeds have one cotyledon.
(d) Dicots have fibrous roots, while monocots have taproots.
Answer: (b) Monocots have fibrous roots, while dicots have taproots.
Monocots, such as wheat and maize, have one cotyledon in the seed, parallel venation and fibrous roots. Dicots, such as gram and mango, have two cotyledons, reticulate venation and taproots. Options (a), (c) and (d) state the features the wrong way round.
Related Study Material on Extramarks
- CBSE Important Questions Class 6 Science Chapter 1
- CBSE Important Questions Class 6 Science Chapter 3
- CBSE Important Questions Class 6 Science Chapter 4
- CBSE Important Questions Class 6 Science Chapter 5
- CBSE Important Questions Class 6 Science Chapter 6
- CBSE Important Questions Class 6 Science Chapter 7
- CBSE Important Questions Class 6 Science Chapter 8
- CBSE Important Questions Class 6 Science Chapter 9
- CBSE Important Questions Class 6 Science Chapter 10
- CBSE Important Questions Class 6 Science Chapter 11
- CBSE Important Questions Class 6 Science Chapter 12
Q.1 Why is glucose called a source of instant energy?
Marks:2
Ans
Glucose directly enters the blood and produces energy immediately through the process called respiration. Hence, it acts as a source of instant energy.
Q.2 Why are only some fruits and vegetables cooked?
Marks:3
Ans
- Fruits and vegetables are rich in minerals and vitamins. These are present in a very small amount.
- The improper washing of the fruits and vegetables results in the leaching of nutrients through water. Therefore, fruits and vegetables must not be washed after peeling and cutting.
- Apart from this, cooking improves the taste of food but cooking fruits results in the loss of nutrients.
Q.3 Complete the given table:
| Nutrients | Deficiency disorder | Symptoms |
| Poor vision or loss of vision | ||
| Anaemia | ||
| Vitamin C | ||
| Vitamin B1 | ||
| Tooth decay |
Marks:5
Ans
| Nutrients | Deficiency disorder | Symptoms |
| Vitamin A | Night blindness | Poor vision or loss of vision |
| Iron | Anaemia | Weakness |
| Vitamin C | Scurvy | Bleeding gums |
| Vitamin B1 | Beriberi | Weak muscles |
| Calcium | Tooth decay | Weak bones |
Q.4 Which of the following needs to be increased in the diet of a growing child?
(a) Carbohydrates(b) Proteins(c) Minerals(d) Vitamins
Marks:1
Ans
Proteins are body-building foods that help in growth and repair. They are required for the growth and development of a child.
Q.5 Which of the following helps in the removal of wastes from the body?
(a) Fat(b) Water(c) Calcium(d) Vitamins
Marks:1
Ans:
Water helps in the absorption of nutrients present in the digested food. It also helps in the removal of wastes from the body.