Advertisements
Advertisements
Question
What is emasculation?
Advertisements
Solution
Emasculation is the process of removing stamens from the female parent flower before they have burst and shed their pollen, done to prevent self-fertilisation during hybridisation in plants. It ensures that only the desired pollen from another plant fertilises the flower.
APPEARS IN
RELATED QUESTIONS
Identify ‘a’, ‘b’ and ‘c’ in the following table:
| S. No. | Crop | Variety | Insect Pests |
| 1. | Brassica | Pusa Gaurav | ‘a’ |
| 2. | Flat bean | Pusa Sem 2 Pusa sem 3 |
‘b’ |
| 3. | ‘c’ | Pusa Sawani Pusa A-4 |
Shoot and fruit borer |
Identify 'A', 'B', 'C' and 'D' in the given table.
| Crop | Variety | Resistance to disease |
| A | Himgiri | Leaf rust |
| Cauliflower | Pusa Shubhra | B |
| Brassica | Pusa Swarnim | C |
| Cowpea | D | Bacterial blight |
State one characteristic of millets that has been improved as a result of hybrid breeding so as to produce high yielding millet crops.
What is Biofortification? Explain selective breeding with suitable example.
Explain selective breeding. Give any 'two' examples and their nutrients obtained by selective breeding.
Smooth leaved and necterless cotton varieties are NOT affected by ____________.
What is meant by ‘hidden hunger’?
Give two important contributions of Dr. M. S. Swaminathan.
The term ‘desirable trait’ can mean different things for different plants. Justify the statement with suitable examples.
Match the following:
| Sr. No. | Column I | Column II | |
| (i) | Eutrophication | (a) | A soil erosion |
| (ii) | Biomagnification | (b) | carbon monoxide, methane |
| (iii) | Particulate pollutant | (c) | Prevention of extinction |
| (iv) | Conservation | (d) | Dust, smog |
| (v) | Gaseous pollutants | (e) | Accumulation of nonbiodegradable substances |
| (vi) | Deforestation | (f) | Death of aquatic ecosystem |
