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प्रश्न
Give the names of ‘two’ insect-resistant crop varieties.
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उत्तर
Pusa Gaurav, Pusa Sawni, and Pusa A-4 are insect-resistant crop varieties.
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संबंधित प्रश्न
Write a short note on ‘Mutational breeding’.
Suggest four important steps to produce a disease resistant plant through conventional plant breeding technology.
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 |
How has mutation breeding helped in improving the production of mung bean crop?
What are analogous organs? Describe with one example from the plant kingdom.
Column - I contains names of host plant while Column - II contains names of viral dieases. Find the correct option.
| Column-I | Column-II | ||
| (I) | Banana | (p) | little leaf |
| (II) | Sugarcane | (q) | bunchy top |
| (III) | Papaya | (r) | leaf roll |
| (IV) | Brinjal | (s) | grassy shoot |
| (t) | leaf curl |
Breeding of crops with high levels of minerals:
Mechanism of fast Speciation in crop plants is ______.
Give two important contributions of Dr. M. S. Swaminathan.
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 |
