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12. Name any five hybrid varieties of crop plants which have been developed in India.

The five hybrid varieties of crop plants which have been developed in India are 1. Sonalika and Kalyan sona of wheat 2. Jaya and Ratna of rice 3. Pusa komal of cowpea 4. Pusa swarnim of mustard 5. Pusa shubra of cauliflower  

11. Find out what the various components of the medium used for propagation of an explant in vitro are?

Propagation of explants in vitro requires the following components in the medium 1. Carbon source such as sucrose 2. Inorganic Salts 3. Vitamins 4. Amino acids 5. Agar-agar 6. Water 7. Growth hormones like auxins and cytokinins. 

10. What is the major advantage of producing plants by micropropagation?

Micropropagation refers to producing a number of plants simultaneously through tissue culture. This process is advantageous for the following reasons 1. It helps in propagating a large number of plants in a shorter time span. 2. New plants produced are exactly identical to the parent plant 3. micropropagation results in the production of healthier and disease resistance plants

9. Which part of the plant is best suited for making virus-free plants and why?

In order to make virus-free plants, apical and axillary meristems are used. These regions of diseased plants do not catch virus infection. Thus from diseased plants, disease-free plants can be obtained by growing their apical and axillary meristems. 

8. Explain what is meant by biofortification.

Biofortification is the process of developing crops having a higher content of vitamins, minerals, proteins, fats etc. Biofortification has been proved to be a method for improving public health. It is undertaken to improve the content and quality of proteins and oils. Atlas 66 is a biofortified wheat variety having high protein content than the existing wheat. Similarly, biofortified varieties...

7. Briefly describe various steps involved in plant breeding.

Plant breeding is the process of crossing two genetically different varieties of plants in order to produce a new hybrid variety that combines selective characteristics of both the parent varieties. Plant breeding is done to induce disease resistance, increased food production, resistance to insect/pest etc in plants, adaptability etc. The process of plant breeding gets completed in certain...

6. Discuss the role of fishery in enhancement of food production.

The fisheries industry deals with catching, processing and marketing of fishes and other aquatic animals that are economically important. Prawns, crabs, lobsters etc are some economically important aquatic animals. Fisheries industry has a major role in the Indian economy as well as in the enhancement of food production in India. A large part of India is dependent on fishes and other aquatic...

5. What is apiculture? How is it important in our lives?

Apiculture refers to the practice of keeping and rearing honey bee i.e. Apis indica in order to produce honey bee, beeswax and other products. Importance of apiculture 1. Apiculture is used to produce honey which is a highly nutritious product used as an indigenous system of medicines. Honey is also useful for the treatment of ailments such as cold, flu and dysentery. 2. Through apiculture,...

4. Name the methods employed in animal breeding. According to you which of the methods is best? Why? 


The term animal breeding refers to selective breeding of interrelated animals in order to create new combinations of characters. The methods of animal breeding are divided into two categories i.e. natural methods of animal breeding and controlled breeding experiments. The natural methods of breeding are as follows: Out-breeding - It refers to the process of the mating of unrelated animals which...

3. What is meant by the term ‘breed’? What are the objectives of animal breeding?

The term 'breed' refers to a group of animals that are related to each other by means of descent and are similar in most of their characteristics characters like general appearance, features, size, configuration etc. Different breeds can be improved via processes of animal breeding The term animal breeding is the production of improved breeds of domesticated animals by improving their genotypes...

2. If your family owned a dairy farm, what measures would you undertake to improve the quality and quantity of milk production?

Dairy farm management or dairying refers to the process of managing animals for milk and its products for consumption by humans. It deals with systems that can increase the yield and improve milk quality. The major prerequisite of increasing quantity and quality of milk by cattle is the quality of breeds. Therefore, if your family owned a dairy farm, the measures that can be undertaken to...

1. Explain in brief the role of animal husbandry in human welfare.

Animal husbandry refers to the process of management of livestock scientifically for human welfare. The process of animal husbandry includes feeding, breeding and control of diseases for raising the livestock populations. The livestock generally reared includes cattle, pig, sheep, poultry birds, bees etc. These animals are reared for various products such as milk, meat, eggs fibre, honey etc....