Are you looking for DAV Books Solutions then you are in right place, we have discussed the detailed solution of Science class 4 book Chapter 2 Plants which is followed in all DAV School Solutions are given below with proper explanation solutions that will help students in their examination. Please bookmark our website for further updates!! All the Best !!
DAV CLASS 4 Plants Science Question and Answer
A. Fill In the blanks.
1. Root is the underground part of a plant.
2. Roots absorb Water and mineral for the plant
3. Neem and peepal have tap roots.
4. Carrot and radish are edible roots.
5. Mangrove plants have aerial roots.
B. Write True or False for the following statements.
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:Carrot
2. This plant has a tap root—(a) banana (b) grass (c) wheat (d)Rose
Answer:Rose
3.Thes plants have breathing roots—(a) mangrove (b) apple (c) neem (d)Rose
Answer: Mangrove
Answer the following questions in brief.
1. Name the two different types of roots.
Answer: Tap roots and Fibrous roots are two different type of roots
2. Give two examples of plants having fibrous roots.
Answer: Cereals and Banana are plants having fibrous roots
3. Why do aerial roots need to come out of the soil?
Answer:Aerial roots need to come out of the soil to get fresh air from the atmosphere as roots in marshy lands don’t get sufficient oxygen.
E. Answer the following questions.
1.Draw the shape of the taproot and the fibrous root.
Ans:
Tap root : Taproots have a main root and other roots arise laterally from the main root. For example : Mango, neem etc.
Fibrous root : In fibrous roots, no main root is present and all roots appear similar and form a cluster. For example : Maize, wheat, onion, sugarcane etc.
2. In what way(s) is the taproot different from the fibrous root?
| Tap root | Fibrous root |
| Tap root has only one main and 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 are similar |
| Tap root grows vertically deep into the soil | Fibrous roots are short and most of them grow horizontally in the soil |
| Tap roots are found in plants which have reticulate venation in their leaves | Fibrous roots are found in plants which have parallel venation in their leaves |
| Tap root is much longer and has extremely large surface area | Fibrous roots are short and have small surface area |
| A single plant has only one tap root | A single plant can have hundreds of fibrous roots |
3. State the two main functions of roots.
The root is an important part of a plant. It helps the plant to absorb water and minerals from the soil. It holds the plant upright in the soil. Thus, absorption and fixation are the two main functions of roots.
4. In what way are the roots of the banyan tree and maize ‘special’?
The branches of a banyan tree get extra support with the help of special roots that grow downwards from the branches. Similarly, some plants, like maize, have thin and long stems which require extra support to keep them erect. Such plants have roots, arising from the base of their stem, that helps to support the plant.
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