Class 6 Science Chapter 2 Extra Questions Diversity in the Living World
Class 6 Science Chapter 2 Diversity in the Living World Important Extra Questions and Answers
Diversity in the Living World Class 6 Extra Questions Very Short Answer Type
Question 1.
Plants are classified into three main categories. Explain briefly.
Answer:
On the basis of size and nature of the stem, the plants are classified into three main categories, i.e. herbs, shrubs and trees.
Question 2.
Herb is different from a shrub. Explain.
Answer:
The herb is a small plant with tender and green stem. Whereas, shrub is bigger than herb and has strong and thicker stem.
Question 3.
It is given that a plant is very tall and has hard, thick stem with branching on the upper part of the plants. On the basis of the given characteristics, categorise the plant. Competency Based Que.
Answer:
On the basis of the given characteristics, it can be concluded that the given plant is a tree.
Question 4.
Differentiate between vein and midrib.
Answer:
A large number of linear structures that spread to all parts of the leaf are called veins. Whereas, the main vein (thick vein) in the middle of the leaf is called midrib.
Question 5.
The leaves of grass are different from those of mango.Explain.
Answer:
The leaves of grass show parallel venation whereas mango leaves have reticulate venation.
Question 6.
In some plants, roots do not have any main root but all the roots are similar. Give some examples of plants having such fibrous roots.
Answer:
The examples of plants with fibrous roots are maize, wheat, rice, etc.
Question 7.
Name the place where an organism lives and gets its food.
Answer:
Habitat is a place where an animal lives and gets its food.
Question 8.
Classify the following habitats into terrestrial and aquatic types.
Grassland, pond, ocean, rice field NCERT Exemplar
Answer:
The habitats can be classified as –
- Terrestrial habitats – Grassland and rice field
- Aquatic habitats – Pond and ocean
Question 9.
A few animals can live in both places, i.e. land and water. Name one.
Answer:
Few animals have adaptations to live both in water as well as land. These are called amphibians, e.g. frog.
Question 10.
An adaptation requires change in body shape of animals. Name the habitat and the modification present.
Answer:
Animals in aquatic habitat have streamlined bodies which help them in surviving underwater.
Question 11.
Camels live in desert habitat. How do they adapt to such harsh climate?
Answer:
Camels have long legs, a hump and padded feet. All of these are adaptive features help camel to survive in desert habitat.
Diversity in the Living World Class 6 Extra Questions Short Answer Type
Question 1.
What do you understand by biodiversity?
Answer:
Biodiversity means the variety of different living things on Earth, including plants, animals and microorganisms. It includes all the different organisms, and the various habitat where they live.
Question 2.
Write down two examples of trees, shrubs, herbs and creepers growing near your area.
Answer: Two examples of trees – Oak and Banyan (bargad).
Two example of shrubs – China rose and Jasmine.
Two examples of herbs – Tomato and Wheat.
Two examples of creepers – Pumpkin and Watermelon.
Question 3.
Explain whether the type of venation shown in fig (a) and (b) is same or different. Give an example of plants in which leave (a) and (b) are found.
Answer:
In both the leaves (a) and (b), the veins run parallel to each other. Therefore, they both shows parallel venatio The leave (a) is found in banana plant, while leave (b) is found in grasses.
Question 4.
Tap root is different from fibrous root. Explain how.
Answer:
The differences between tap and fibrous root are as follows
| Tap root | Fibrous root |
| Tap roots have only one main long root. The smaller roots that grow from the main root are called lateral roots. | Fibrous roots do not have a main root. All roots seem similar. |
| Tap root goes deep into the soil. | They do not go deep into the soil. |
Question 5.
Suggest the type of root system in grass. Also explain that root system.
Answer:
In grass, fibrous root system is present. In such type of roots, there is no nfain root, instead many roots arise from one region. These grow horizontally in soil and make a bushy/clustered appearance.
Question 6.
The type of leaf venation and root in plants are related in an interesting way. Explain the statement.
Answer:
The relation between type of leaf venation and type of roots is as follows
(i) The plant having leaves with reticulate venation has tap roots, e.g. chickpea.
(ii) The plant having leaves with parallel venation has fibrous roots, e.g. wheat.
Question 7.
Differentiate between dicot and monocot plants.
Answer:
The differences between dicot and monocot plants are as follows
| Dicot plants | Moncot plants |
| Seeds have two cotyledons. | Seeds have only one cotyledon. |
| These plants generally have reticulate venation and a tap root system. | These plants generally have parallel venation and a fibrous root system. |
Question 8.
Explain why many mountainous trees are cone-shaped having sloping branches?
Answer:
The trees in mountain habitats are usually cone-shaped having sloping branches because this shape of the mountain trees makes the rainwater and snow slide off easily witho ut damaging the branches and leaves.
Question 9.
The plants given in fig. (a) and (b) belong to same species but have different external characters. Why?
Answer:
Rhododendron found in Nilgiris and Sikkim are different in external characters because they have to adapt to the, specific conditions of their environments. These adaptations help them survive and thrive by addressing factors like water availability, light intensity, soil type and climate. The rhododendrons found in Nilgiris are shorter as compared to the one found in Sikkim.
Question 10.
Mention one adaptation present in the following animals.
(i) In camels to keep their bodies away from the heat of sand.
(ii) In fishes to facilitate movement in water.
Answer:
(i) Camels have long legs to keep their bodies away from heat of sand.
(ii) Fishes have streamlined bodies and fins for movement in water.
Diversity in the Living World Class 6 Extra Questions Long Short Answer Type
Question 1.
The given flowchart represents the classification of plants on the basis of height. Answer the following questions.
(a) Name A, B and C.
(b) What is the nature of stem of B ?
(c) Where do branches appear in A?
(d) Give two examples of C.
Answer:
(a) A-Herbs, B – Shrubs, C-Trees
(b) Shrubs (B) are characterised by a brown, hard and thin stem.
(c) Branches appear close to the ground in ‘A’ (Herbs).
(d) Two examples of C are mango and guava.
Question 2.
(a) Identify the type of seed depicted in the figure X and Y given below. Competency Based Que.
(b) Differentiate between plants with X seed and plants with Y seed.
(c) Give two examples each for plants with X and Y types of seeds.
Answer:
(a) X-Dicot seed, Y – Monocot seed
(b) In X, i.e. dicot seed, there are two cotyledons while in Y, i.e. monocot seed there is a single thin cotyledon.
(c) Two examples plants with X (dicot seeds) are of chickpea and beAnswer:
Two examples of plants with Y (monocot seed) are maize and wheat.
Question 3.
Below are two figures showing two plants in their natural habitat.
Competency Based Que.
(a) Identify plant A and B. Also, mention their natural habitat.
(b) What are the characteristics of ‘A’?
(c) What are the characteristics of ‘B’?
(d) What special adaptation helps plant A to survive in its natural habitat?
(e) What special adaptation help plants B to survive in its natural habitat?
Answer:
(a) A represents cactus plants found in deserts of Rajasthan while B represents deodar trees found in the Himalayas of Himachal Pradesh.
(b) A, i.e. cactus plants have thick and fleshy stems.
(c) Deodar trees are conical in shape and have flexible and sloping branches.
(d) The fleshy stems of cactus found in the desert can store water and help them tolerate the hot conditions in their natural habitat.
(e) In order to survive in extremely cold regions, deodar trees have conical shape and sloping branches, which enables them to slide off the snow easily.
Diversity in the Living World Class 6 Extra Questions Case Based
Question 1.
Observe figure and attempt the questions that follow it. Competency Based que.
(a) Label the parts (I), (ii), (iii) and (iv) in the figure.
(b) What type of venation does the leaf has?
(c) What type of venation is seen in grass leaves?
Answer:
1. (a) In the given figure
(i) Petiole
(ii) Midrib
(iii) Lamina
(iv) Vein
(b) The leaf has reticulate venation as the veins in leaf occur in an irregular way forming a net-like pattern.
(c) Grass leaves have parallel type of venation. In which the veins run parallel to each other on both sides of midrib.
Question 2.
Ravi and Ritu went on a vacation to different places. They went to Rishikesh, Himalayas, Kerala, Rajasthan. They saw many kinds of trees, plants and animals, e.g. pine trees on Himalayas and cactus in Rajasthan.
All the places were so different from each other. They clicked pictures, collected samples and showed it to their teacher asking to explain the reason behind these variations.
(a) Why is there a difference in type of plants growing in different places?
(b) How many types of places, that give living organism shelter, food, etc. are you aware about?
(c) Give an example of variation in plants from different regions.
Answer:
(a) Plants growing in different places appear different due to the presence of unique adaptive features.
(b) Two types of habitats have been observed (i) terrestrial
(ii) aquatic.
(c) Leaves of cactus present in desert, are either absent or are very small and spiny to reduce water loss through transpiration. While leaves of trees like deodars are needle-shaped to let snow falling on then slide off easily.
Diversity in the Living World Class 6 Extra Questions Skill Based
Question 1.
Make a group of students, study as many herbs, creepers and climbers in your locality. Record your observations share the data and present it to the class. – Research skill
Question 2.
Describe an experiment or observational study to determine how specific adaptations aid an animal surival in its habitat. – Scientific skill
Answer:
Observational Study: How giraffes use their long necks?
Aim: To see how giraffes use their long necks to find and eat food that other animals cannot reach.
Material Required: Pen and notebook
Procedure :
- Watch how giraffes use their long necks to reach the leaves on tall trees.
- Take note of how often they eat from the tall trees compared to lower plants.
- Look at other animals and compare what you see with other animals that have shorter necks.
- Notice if these animals are eating leaves from the same tall trees or if they stick to lower plants.
- Compare the findings and write down your observation.
Observation: Giraffes use their long necks to reach and feed on leaves from tall trees while animals with short neck in the same area stick to the lower vegetation.
Conclusion: If girafics are able to reach food that other animals can not, their long necks are a helpful adaptation that helps them find more food and survive better in their environment.
Question 3.
Raj observed that his mother watered the Hibiscus plants everyday, but watered cactus plant only once in 3 days. What could be the reason behind this? – Thinking skill
Answer:
Cacti have thick, fleshy stems that store water. As they are adapted to dry conditions and do not need much water. On the other hand, Hibiscus plants need a regular supply of water because they have big leaves that lose a lot of water.
That’s why, Raj mother’s watered the Hibiscus plants every day, but watered cactus plant only once.
Question 4.
Visit a zoo in your locality with your parents or teacher. Observe and make a list of the arrangements that are made for the animals that have been brought there from different habitats. – observation skill
Question 5.
If a type of animal goes extinct in a forest how might it affect other animals and plants in that forest?
Explain how losing one species can change the balance of whole ecosystem. – Thinking skill
Answer:
Losing one animal can disturb the balance of the whole forest. It can affect the food chain, plant growth and even the habitat, showing how every animal plays an important role in keeping the forest healthy and balanced.