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Selina Solutions Class 9 Biology Solutions for Exercise in Chapter 5 - Pollination And Fertilization

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Question 15 Exercise
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Describe the advantages and disadvantages of cross-pollination to the plant.

Answer:

Listed below are the advantages of cross-pollination:

• Nature favors cross-pollination

• The offspring produced this way are healthier

• The seeds produced by this process are viable and in abundance.

• Cross-pollination can be used to produce new varieties using two different varieties of the same species or even two species.

Listed below are the disadvantages of cross-pollination:

• As some pollinating agents are always required which may not be available at the required time, pollination is not always certain.

• Wastage of pollen takes place as the pollen has to be generated in abundance to ensure pollination

• It is uneconomical for the plant as the flowers are required to be fragrant, vibrant, large and producing nectars to attract the agents causing pollination

Video transcript
"hello everyone welcome to leader this is priya and here we have a question about cross pollination let us look into the question describe the advantages and disadvantages of cross pollination to the plant first let us discuss about the advantages coming to the advantages of cross pollination nature favors this cross pollination nature is nature will support the cross pollination nature favors this cross-pollination and second uses the offsprings which are produced by cross-pollination of springs will be healthier so offsprings that are produced by this cross pollination are healthier they'll be so healthy because of cross pollination and the third uses cross pollination can be used to produce new varieties it is used to produce new varieties so new varieties can be produced by using cross pollination and coming to the at disadvantages no now so this cross coordination also have some disadvantages let us discuss about the disadvantages of cross pollination the first thing is cross pollination needs some pollinating agents so every time for the cross pollination the flower at the plant has to depend on it has to depend on some pollinating agents like insects a wind so these flowers has to depend on pollinating agents if those are not present pollination doesn't takes place in a flower this is the first disadvantage and coming to the second disadvantage lot of pollen grain so there will be a wastage of pollen grains because this is a cross pollination that needs a lot of pollen grains to be pollinated so there will be wastage of woolen grains in case of cross pollination and the flower has to produce more pollen grains and the third disadvantages is it is unknown economically for the plants as the flowers are required to be fragrant vibrant large and producing nectars as to attract attract the insects the flowers has to be designed in that way so that they have so that they show they show some vibrant colors the flower petals should have some vibrant colors it they should produce the fragrance to attract insects and animals fragrance and nectar because some insects like honey bees and butterflies will come to collect nectar right so the flowers has to produce nectar also to get to to attract the insects so these are the disadvantages of cross pollination hope you understand this video if you like my video please subscribe to our leader channel and if you have any doubts you can keep a message in comment box thank you"
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Exercise
Chapters
Introducing Biology
Cell: The Unit Of Life
Tissues: Plant And Animal Tissues
The Flower
Pollination And Fertilization
Seeds: Structure And Germination
Respiration In Plants
Five Kingdom Classification
Economic Importance Of Bacteria And Fungi
Nutrition
Digestive System
Skeleton – Movement And Locomotion
Skin – The Jack Of All Trades
The Respiratory System
Hygiene
Diseases: Cause and Control
Aids To Health
Health Organizations
Waste Generation and Management
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