DAV Class 5 Science Chapter 2 Question Answer – Plants

The DAV Class 5 Science book Solutions and DAV Class 5 Science Chapter 2 Question Answer – Plants are essential study tools for DAV public school students in Class 5.

DAV Class 5 Science Chapter 2 Question Answer – Plants

DAV Class 5 Science Ch 2 Question Answer – Plants

Something To Know

A. Fill in the blanks.

Question 1.
______ are known as food factories of the plant.
Answer:
leaves

Question 2.
Plants, like ______ reproduce through roots.
Answer:
sweet potato

Question 3.
______ and ______ are the raw materials needed for photosynthesis.
Answer:
water, carbon dioxide

Question 4.
______ is a small hole present on the seed.
Answer:
micropyle

Question 5.
Movement of seeds, from one place to another is called ______
Answer:
dispersal.

B. Match the following.

Column I	Column II
1. type of reproduction without seeds	(a) chlorophyll
2. green pigment present in leaves	(b) banana
3. a fruit that does not bear seeds	(c) bryophyllum
4. reproduction through leaves	(d) pea and ladyfinger
5. dispersal of seeds through cracking	(e) vegetative reproduction

Answer:

Column I		Column II
1. type of reproduction without seeds	e	(a) chlorophyll
2. green pigment present in leaves	a	(b) banana
3. a fruit that does not bear seeds	b	(c) bryophyllum
4. reproduction through leaves	c	(d) pea and ladyfinger
5. dispersal of seeds through cracking	d	(e) vegetative reproduction

C. Tick (✓) the correct option.

1. The small baby plant, coming out of a seed is known as the
(a) Grain
(b) Stomata
(c) Root
(d) Seedling
Answer:
(d) Seedling

2. The process, by which a plant make its own food, is called
(a) Photosynthesis
(b) Germination
(c) Reproduction
(d) Dispersal
Answer:
(a) Photosynthesis

3. Which of these plants has only one cotyledon?
(a) Gram
(b) Pea
(c) Wheat
(d) Bean
Answer:
(c) Wheat

4. For proper germination, a seed needs
(a) Water only
(b) Just the right temperature
(c) Air only
(d) Water, air as well as the appropriate temperature
Answer:
(d) Water, air as well as the

5. Lotus seeds are dispersed mainly through
(a) Insects
(b) Birds
(c) Air
(d) Water
Answer:
(d) Water.

D. Answer the following Questions in brief.

Question 1.
Name the pigment present in green leaves of a plant.
Answer:
Chlorophyll

Question 2.
Why do some plants feed on insects?
Answer:
Some plants grow in soil which is deficient in nitrogen salts. These plants eat insects to fulfill their need of nitrogen.

Question 3.
Name the two methods of reproduction in plants.
Answer:
Two methods of reproduction in plants are as follows:

1. Reproduction through seeds
2. Reproduction through underground stem, stem cutting, roots and leaves.

Question 4.
State the conditions required for the proper germination of a seed.
Answer:
Following conditions are required for the proper germination of seeds:

1. Air
2. Water
3. Right temperature

Question 5.
Name two plants that reproduce through stem cuttings.
Answer:
Rose and Bougainvillea

E. Answer the following Questions.

Question 1.
Why do all seeds not germinate to form new plants?
Answer:
Some of seeds may not be of good quality. Most of the seeds get eaten by animals. Some seeds may not get favourable conditions. So, all seeds may not germinate to form new plants.

Question 2.
Seeds do not germinate when they are kept in an ice-box or refrigerator. Why?
Answer:
When seeds are kept in ice-box or refrigerator, they do not get proper temperature for germination. Hence, such seeds do not germinate.

Question 3.
State the importance of vegetative reproduction in plants.
Answer:
Importance of vegetative reproduction:

1. This helps farmers to produce plants without seeds.
2. This helps in growing new plants in short period.
3. This helps to produce better variety of plants.

Question 4.
List any three natural ways of seed dispersal. Give one example for each of them.
Answer:
Three natural ways of seed dispersal are as follows:
(a) By wind: Madar
(b) By water: Lotus
(c) By animals: Papaya
(d) By rupturing: Ladyfinger

Question 5.
How can one grow a rose plant without seeds?
Answer:
One can take a stem cutting and insert it in soil. After some time, the stem cutting will produce new roots and shoots. Thus, a new plant grows from stem cutting of rose plant.

Question 6.
State the function of the following:
(a) Seed coat
Answer:
Protection of seed

(b) Cotyledons
Answer:
Providing food to the baby plant

(c) Micropyle
Answer:
Allows water to enter seed

Question 7.
Write the ways of dispersal of seeds in the following plants.
Answer:

Plants	Ways/Agents of Dispersal of Seeds
Madar	Wind
Lotus	Water
Castor	Animal
Beans	Rupturing
Mango	Animals
Water lily	Water

Value Based Questions

Question 1.
In what ways Riya and her mother took care of plants?
Answer:
They watered the plants regularly. They also shielded the plants from the heat of the sun during day time. Thus, Riya and mother took care of plants.

Question 2.
State the qualities of Riya that are depicted by this situation.
Answer:
Riya shows sense of respohsibility. She also shows how to help our neighbours.

Question 3.
What could have happened if Riya and her mother had not taken care of their neighbour’s plants?
Answer:
If the plants were not cared properly, many of them would have died.

Something To Do

Question 1.
Have you ever thought of planting a sapling on your birthday or gifting saplings as return gift to your friends? Do such activities help to save environment? Discuss.
Answer:
I have never thought about it. But now I am seriously thinking of using saplings as birthday gift. I think, planting trees help in saving our environment. Plants take up carbon dioxide and release oxygen during photosynthesis. Thus, they clean the air around us. Plants also help in bringing rains. They also protect from soil erosion.

Question 2.
Draw a well labeled diagrams of five different seeds in your notebook.
Answer:
Do it yourself.

Question 3.
Solve the crossword puzzle.

Across:
1. The process by which a seed produces a baby plant (11)
4. Important for plant growth (4)
6. A young plant (8)

Down:
2. A plant that grows from stem cuttings (4)
3. Store food for the baby plant (10)
5. Lotus seeds are dispersed by ………… (5)
Answer:

Question 4.
Take some seeds of wheat and moong dal. Soak them in water overnight and put them in soil. Record your observations and compare the results with your classmates. Discuss the same with your teacher. Record your observations with diagrams in following manners. Use the table on page 27 of the textbook for this.
Answer:
Do it yourself.

DAV Class 5 Science Chapter 2 Solutions – My Body

I. Multiple Choice Question (MCQs)

1. Plants get carbon dioxide from which source?
(a) Soil
(b) Air
(c) Roots
(d) Leaves
Answer:
(b) Air

2. Which of the following is usually made by plants during photosynthesis?
(a) Carbohydrate
(b) Protein
(c) Fat
(d) Vitamin
Answer:
(a) Carbohydrate

3. Which of the following plants grows through underground stem?
(a) Wheat
(b) Pea
(c) Potato
(d) Sweet potato
Answer:
(c) Potato

4. Which of the following plants grows through roots?
(a) Ginger
(b) Sugarcane
(c) Bryophyllum
(d) Dahlia
Answer:
(d) Dahlia

5. Seeds of which plant is dispersed by wind?
(a) Madar
(b) Coconut
(c) Mango
(d) Watermelon
Answer:
(a) Madar.

II. Fill in The Blanks:

Question 1.
Minute pores on leaves are called ______
Answer:
stomata

Question 2.
Bryophyllum reproduces through ______
Answer:
leaves

Question 3.
Venus Fly Trap is an example of ______ plant.
Ans.
insectivorous

Question 4.
There are ______ cotyledons in a pea seed.
Answer:
two

Question 5.
Ginger plant reproduces through ______ stem.
Answer:
underground.

III. Write True/False:

1. A plant gets carbon dioxide from soil.
2. Food is stored in the form of starch in plants.
3. Sugarcane reproduces through seeds.
4. Pitcher plant is an insectivorous plant.
5. Seeds of coconut are dispersed by wind.
Answer:
1. A plant gets carbon dioxide from soil. (False)
2. Food is stored in the form of starch in plants. (True)
3. Sugarcane reproduces through seeds. (False)
4. Pitcher plant is an insectivorous plant. (True)
5. Seeds of coconut are dispersed by wind. (False)

IV. Define the Following:

Question 1.
Photosynthesis
Answer:
The process by which a plant makes its own food is called photosynthesis.

Question 2.
Reproduction
Answer:
The process by which a living being produces its own kind is called reproduction.

Question 3.
Dispersal of seed
Answer:
The process by which seeds are scattered far and wide is called dispersal of seed.

Question 4.
Vegetative reproduction
Answer:
When a plant reproduces through roots, underground stem, stem cutting or leaves; it is called vegetative reproduction.

Question 5.
Seedling
Answer:
The new plant formed just after germination is called seedling.

V. Answer the Following Question in one Word:

Question 1.
What is the source of energy for photosynthesis?
Answer:
Sunlight

Question 2.
What is the name of minute pores on the surface of leaves?
Answer:
Stomata

Question 3.
How many cotyledons are present in a wheat seed?
Answer:
One

Question 4.
Potato reproduces through which part?
Answer:
Underground stem

Question 5.
What is the agent of seed dispersal for a madar seed
Answer:
Wind

VI. Answer the Following Question:

Question 1.
What are the raw materials for photosynthesis? How does a plant obtain them?
Answer:
Carbon dioxide and water are the raw materials for photosynthesis. Plant takes water from soil through roots. Plant takes carbon dioxide from air through stomata.

Question 2.
What is the need for dispersal of seeds?
Answer:
If all the seeds would drop at the same place near the plant, most of them would not grow into new plants. This happens because of increased competition for sunlight, air and nutrients. Hence, for proper growth of new plants it is important that seeds germinate at different places. So, dispersal of seeds is necessary for plants.

Question 3.
Explain germination of seed.
Answer:
When a seed get favourable condition; like proper temperature, moisture and air; it grows into a new plant. This process is called germination of seed. Cotyledons provide food for the growing plant. When new leaves emerge, the plant starts making its own food.

Question 4.
Explain dispersal of seeds by animals.
Answer:
Some seeds have hook like structures. Thus, such seeds stick to the fur of animals and get carried away. Examples: castor, burdock, cockleburr and mimosa. In some other cases, the seeds are dispersed through animal droppings, e.g. papaya, melon, pumpkin, gourd and mango.

VII. Picture Based Question:

Label the following figure as shown by A, B and C.

Answer:
A. Baby plant
B. Seed coat,
C. Cotyledon.