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Androgenic haploid embryos were first produced by ...............

A
Guha and Maheswari

B
Steward and Maheswari

C
Miller and Maheswari

D
White and Maheswari

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Guha and Maheswari in 1964 developed an anther culture technique for the production of haploids in the laboratory. Haploid production by wide crossing was reported in barley and tobacco. Tobacco, rapeseed and barley are the most responsive species for doubled haploid production. Doubled haploids can be produced in vivo or in vitro. Haploid embryos are produced in vivo by parthenogenesis, pseudogamy or chromosome elimination after wide crossing.
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Biversity of life forms (living organisms) on earth. Biodiversity, in fact, is a broader term, which was popularised by social biologist Edward Wilson. He organisations: Genetic diversity, species diversity and ecological dioxide. diversity. Please also see Short Answer Questions I Q.No. 10. (vi) In angios Also see Short Answer Questions II Q.No. 7. For conservation of biodiversity see answer to Long ver Questions Q.No. 3: 2. Why is conservation of wild life essential? types of insects being most intel Q. 2. Why is conservation of wild life essenti [2015 legacy to future Or Explain the importance of biodiversity. [2022 GS] Ans. For definition of biodiversity see Short Answer Questions II Q.No 1. Significance of Conservation of Wildife e several direct and indirect advantages of wildife were conservation of biodiversity. These advantages can be divided into three different categories: Narrowly utilitarian, broadly utilitarian and ethical. 1. Narrowly utilitarian: Direct, materialistic advantages of biodiversity are included in this category. Several species of living organisms are directly useful for mankind. The list of these advantages is so long that it cannot be presented even in a single book. Only selected advantages are mentioned here: treatment of disease were obtained from plants. About 25,000 conservatic species of plants are used globally in different countries for certain pai different traditional therapies. In our system of medicine, In a bi Ayurveda, medicines are obtained from plants only. More are conser than 25 per cent of the drugs currently sold in market world are allow wide are derived from plants. Thousands of species of Therefore medicinal plants, are yet to be identified from tropical rain education forests. Exploration of molecular, genetic and species level India ou diversity for products of economic importance is called reserve bioprospecting. (ii) Industrial significance: We get timber, tannins, pulp for paper industry, dyes, resins, perfumes, rubber, honey, bee wax etc. (iii) Agricultural significance: Biodiversity provides food material, fodder, fibres, fuel \& wood etc. Genetic diversity provide genes with diverse characters for genetic engineering. 2. Broadly utilitarian: Biodiversity forms the basis for ecosystem services. These are included in the category of indirect advantages as they are not visible superficially. (i) Various types of organisms contribute significantly in nutrient cycling or biogeochemical cycling. They maintain the balance of oxygen and carbon dioxide in atmosphere, help in nitrogen fixation and water cycle.
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Question Text
Androgenic haploid embryos were first produced by ...............
TopicSexual Reproduction in Flowering Plants
SubjectBiology
ClassClass 12
Answer TypeText solution:1
Upvotes61