DAV Class 5 Science Solution Chapter 2 Plants
DAV School Books Class 5 Science Solution Chapter 2 Plants all Question Answer. DAV Class 5 2nd Chapter Plants full Chapter explanation by expert teacher.
A.) Fill in the blanks.
Answer: (1) Leaves (2) dahlia (3) carbon dioxide, water (4) Micropyle (5) seed dispersal.
B.) Match the following
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: 1. e 2. a 3. b 4. c 5. D
C.) Tick the correct option.
1.) The small baby plant, coming out of a seed is known as the-
Answer: seedling
2.) The process, by which a plant makes its own food, is called-
Answer: photosynthesis
3.) Which of these plants has only one cotyledon?
Answer: wheat
4.) For proper germination, a seed need-
Answer: water, air as well as the appropriate temperature
5.) Lotus seeds are dispersed mainly through-
Answer: water
D.) Answer the following questions in brief.
1.) Name the pigment present in green leaves of a plant.
Answer:The pigment is known as chlorophyll
2.) Why do some plants feeds on insects?
Due to the absence of nutrition in the soil where these plants grow the plants need important minerals such as nitrogen. unable to get it from the soil they feed on insects
3.) Name the two methods of reproduction in plants.
Answer: the two methods of reproduction implant are Reproduction through seeds or reproduction by different parts of the plant which is also known as vegetative reproduction
4 )State the conditions required for the proper germination of a seed.
Answer:
Air water and the correct temperature is required for germination of seeds
5.) Name two plants that reproduce through stem cuttings.
Answer: Sugar cane and bougainvillea reproduce through stem cutting method
Reproduce through stem cutting method
E.) Answers the following questions.
1.) Why do all seeds not germinate to form new plants?
It is so because they do not get the proper amount of air water sunlight nutrients required for them to survive
2.) Seeds do not germinate when they are kept in an ice-box or refrigerator. Why?
Seeds will not germinate when they are kept in an ice box or refrigerator because for germination to occur an optimum temperature needs to maintain which is not the case inside the cool refrigerator
3.) State the importance of vegetative reproduction in plants.
Vegetative reproduction is important because it is easier to conduct and the results are achieved much faster.
4.) List any three natural ways of seed dispersal. Give one example for each of them.
Seed dispersal by wind happens to be one of the methods of seed dispersal. The seeds of dandelion get dispersed with the help of wind
Other than that seeds also get dispersed by water. The seeds of hydrilla are dispersed by water
Seeds are also dispersed by humans and animal activity. in plants such as mimosa seeds are carried by humans or animals.
5) How can one grow a rose plant without seeds?
With the method of vegetative reproduction using the method of stem cutting roses can be grown without its seed
6.) State the function of following:
(a) Seed coat – (b) Cotyledons –
(c) Micropyle –
The seedcoat is just an outer protective layer that protects the seed leaves inside it
The cotyledons are the seed leaves and within these there exists a new baby plant. hence the cotyledons give rise to a new individual
Micropile it’s a small hole within the seat that enters water to enter it.
7.) Write the ways of dispersal of seeds in the following plants.
Wind
Water
Humans and animals
Cracking or bursting
Cracking or bursting
Water
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