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प्रश्न
Importing better varieties and plants from outside and acclimatizing them to the local environment is called
विकल्प
cloning
heterosis
selection
introduction
उत्तर
Introduction
संबंधित प्रश्न
Write a short note on ‘Mutational breeding’.
Give reason :
Emasculation is done in a flower which is selected as female parent.
Which steps would you follow to develop a new variety of crop plant by selective breeding?
Name the scientists who Coined the term Diffusion Pressure Deficit
What are analogous organs? Describe with one example from the plant kingdom.
Answer the following question:
Give the scientific term used for the preservation of germplasm at a very low temperature.
In hybridization experiments 'true breeding' means off-springs show ____________.
Which method of plant breeding has been used to develop a powdery mildew-resistant variety of moong beans?
Sonora – 64 is a variety of ______.
Give any four advantages of mutation breeding.
Breeding of crops with high levels of minerals:
Mechanism of fast Speciation in crop plants is ______.
Which one of the following pathogens causes cancer disease?
Sugarcane which grow in North India, and which do not grow in north India.
Sonalika and Kalyan Sona are varieties of ______.
Lysine and tryptophan are ______.
What is meant by ‘hidden hunger’?
What is meant by germplasm collection? What are its benefits?
Discuss natural selection and artificial selection. What are the implications of the latter on the process of evolution?
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 |
