The DAV Class 4 Science Book Solutions and DAV Class 4 Science Chapter 2 Question Answer – Plants are essential study tools for DAV public school students in Class 4.
DAV Class 4 Science Chapter 2 Question Answer – Plants
DAV Class 4 Science Ch 2 Question Answer – Plants
Something To Know
A. Fill in the blanks:
Question 1.
______ is the underground part of a plant.
Answer:
Root
Question 2.
Roots absorb ______ and ______ for the plant.
Answer:
Water, minerals
Question 3.
Neem and peepal have ______ roots.
Answer:
Tap
Question 4.
______ and ______ are two main functions of roots.
Answer:
Absorption, fixatio
Question 5.
Mangrove plants have ______ roots.
Answer:
Aerial.
B. Write True or False for the following statements.
1. Carrot and beetroot store food in them.
2. Beans and rose have fibrous roots.
3. All roots are edible.
4. Roots do not get sufficient oxygen in marshy areas.
Answer:
1. Carrot and beetroot store food in them. (True)
2. Beans and rose have fibrous roots. (False)
3. All roots are edible. (False)
4. Roots do not get sufficient oxygen in marshy areas. (True)
C. Tick (✓) the correct option.
1. The root of this plant stores food
(a) mango
(b) apple
(c) banana
(d) carrot
Answer:
(d) carrot
2. This plant has a tap root
(a) banana
(b) grass
(c) wheat
(d) rose
Answer:
(d) rose
3. These plants have breathing roots
(a) mangrove
(b) apple
(c) neem
(d) peepal
Answer:
(a) mangrove
D. Answer the following Questions in brief.
Question 1.
Name the two different types of roots.
Answer:
Types of roots:
(a) Tap root
(b) Fibrous root
Question 2.
Give two examples of plants having fibrous roots.
Answer:
Grass and wheat
Question 3.
Why do aerial roots need to come out of the soil?
Answer:
Roots of plants in marshy areas do not get sufficient oxygen. In these plants, aerial roots need to come out of the soil. This helps the roots in getting enough oxygen.
E. Answer the following Questions.
Question 1.
Draw the shape of the tap root and the fibrous root.
Answer:
Question 2.
In what way(s) is the tap root different from the fibrous root?
Answer:
| Tap root | Fibrous root |
| A single, long root comes out from the plant. | Many roots come out from the plant. |
| A tap root usually grow deeper into the soil. | Fibrous roots do not grow much deeper into the soil. |
Question 3.
State two main functions of roots.
Answer:
Two main functions of roots are as follows:
(a) Anchoring the plant in to the soil.
(b) Absorption of water and minerals from the soil.
Question 4.
In what way are the roots of banyan tree and maize ‘special’?
Answer:
The roots of banyan tree and maize serve special purpose. These roots provide extra support to the banyan tree or the maize plant. Hence, roots of banyan and maize trees can be called ‘special’.
Value Based Questions
Question 1.
What does the above situation tell us about Rohan?
Answer:
Rohan appears to be a nice boy. He is concerned about the environment. He is also concerned about the difficulties of poor people.
Question 2.
How did he help the watchman?
Answer:
Rohan helped the watchman by giving him a blanket.
Question 3.
Rohan, stopped the watchman from cutting trees. Have you ever done anything similar to save your environment?
Answer:
Once I was playing in the nearby park. I saw the gardener trying to burn a heap of dry leaves. I explained to him that it was bad for the environment. The gardener understood the matter and stopped burning those leaves. He buried those leaves in a pit to make compost. That is how I tried to save the environment.
Something To Do.
Question 1.
Take a small sapling of grass and a mustard plant, observe their roots and note down their differences, if any.
Answer:
Tap root is present in mustard plant, while fibrous roots are present in grass.
Question 2.
Prepare a chart showing some ‘edible roots’. List down the ways in which they are usually eaten.
Answer:
| Edible roots | Way of eating |
| Carrot | Raw and cooked |
| Radish | Raw and cooked |
| Beetroot | Raw and cooked |
| Sweet potato | Cooked |
In Class-III, we learnt a little bit about plants. Let us revise the same completing the following statements:
Help Box: chlorophyll, stem, seeds, root.
(a) ______ fixes the plant to the soil.
Answer:
Root
(b) ______ supports the plant and keeps it upright.
Answer:
stem
(c) ______ Leaf has in it to prepare food and to make it green.
Answer:
chlorophyll
(d) Fruits have ______ in them which germinate to form plants.
Answer:
Seeds
DAV Class 4 Science Chapter 2 Solutions – Plants
I. Multiple Choice Questions:
1. Which part of the plant usually grows under the ground?
(a) Root
(b) Stem
(c) Leaves
(d) Buds
Answer:
(a) Root
2. Which of the following plants has edible root?
(a) Banana
(b) Carrot
(c) Neem
(d) Pea
Answer:
(b) Carrot
3. Which of the following plants has special roots for extra support?
(a) Mango
(b) Neem
(c) Banyan
(d) Guava
Answer:
(c) Banyan
4. Which of the following plants has fibrous roots?
(a) Mango
(b) Neem
(c) Banana
(d) Peepal
Answer:
(c) Banana
5. Which of the following plants has tap root?
(a) Pea
(b) Wheat
(c) Maize
(d) Grass
Answer:
(a) Pea
II. Fill in the blanks:
Question 1.
______ of a carrot plant can be eaten.
Answer:
Root
Question 2.
Special roots come out from ______ of a banyan tree.
Answer:
branches
Question 3.
Special roots come out from the ______ of stem in a maize plant.
Answer:
base
Question 4.
______ plants grow in marshy areas.
Answer:
mangrove
Question 5.
______ roots have branches.
Answer:
Tap.
III. Write True or False for the following:
1. Stems usually grow under the ground.
2. Roots usually grow above the ground.
3. Roots help a plant to stand upright in soil.
4. Tap root is found in a maize plant.
5. Fibrous roots are found in wheat plant.
Answer:
1. Stems usually grow under the ground. (False)
2. Roots usually grow above the ground. (False)
3. Roots help a plant to stand upright in soil. (True)
4. Tap root is found in a maize plant. (False)
5. Fibrous roots are found in wheat plant. (True)
IV. Answer the following Questions in one word:
Question 1.
Which type of root has branches?
Answer:
Tap root
Question 2.
Which type of root does not have | branches?
Answer:
Fibrous root
Question 3.
What is the name of a root which can I be eaten?
Answer:
Edible root
Question 4.
What is the source of water and minerals i for plants?
Answer:
Soil
Question 5.
What is the function of special roots in a banyan tree?
Answer:
Extra support
V. Answer the following Questions in brief:
Question 1.
What are the functions of roots?
Answer:
Following are the functions of roots:
- Roots hold the plant upright in soil.
- Roots help the plant to absorb water and minerals from the soil.
Question 2.
Explain different types of roots.
Answer:
There are two types of roots. These are as follows:
(a) Tap Root: A single, main, long root with many thin roots arising from it is called tap root. Examples: beans, okra, mango, neem, peepal, etc.
(b) Fibrous Roots: When many thin roots arise from the base of the plant; they are called fibrous roots. Examples: banana, maize, wheat, rice, grass, etc.
Question 3.
Write the names of the main parts of a plant.
Answer:
A plant has following main parts: root, stem, branches, leaves, flowers and fruits.
Question 4.
What is the function of aerial roots in mangrove plants?
Answer:
The aerial roots in mangrove plants allow fresh air to enter the roots.
Question 5.
What is the special function of roots in a carrot plant?
VI. Picture Based Question
Question 1.
Label the following figure as shown by 1 to 5
Answer:
1. Root
2. Stem
3. Leaf
4. Flower
5. Fruit.
DAV Class 4 Science Chapter 2 Notes – Plants
→ Parts of a plant: A plant has six main parts: root, stem, branches, leaves, flowers and fruits.
→ Root: Root usually grows under the ground. When the plant grows, its roots become thick and woody with corky outer layer.
→ Types of Root: There are two types of roots. These are as follows:
- Tap Root: A single main long root with many thin roots arising from it, is called tap root. Examples: beans, okra, mango, neem, peepal, etc.
- Fibrous Roots: When many thin roots arise from the base of the plant; they are called fibrous roots. Examples: banana, maize, wheat, rice, grass, etc.
→ Functions of Root
- Roots hold the plant upright in soil.
- Roots help the plant to absorb water and minerals from the soil.
→ Special Functions of Root
- In some plants, food is stored in roots. Examples: carrot, radish and beetroot. Such roots are used as food and are also called edible roots.
- In some plants roots provide extra support. For example; in a banyan tree roots grow from the branches and go down into the ground. These roots provide extra support to the banyan tree. In maize plant, many roots come out from the base of the stem to provide extra support.
- In mangrove plants, hollow roots grow in upward direction. These hollow roots provide passage for fresh air to enter. Mangrove plants are found in marshy areas and air is not present in marsh. Such roots are called aerial roots.