For curing of tea, a bacteria Micrococcus candicans is used. Curing of tea leaves is brought about by the activity of bacteria. It is essentially an oxidation, dry fermentation process, during which water is driven off the green colour is lost and the leaves assume a tougher texture and undergo chemical changes. Mycorrhiza is a mutually beneficial association between fungi and the roots of higher plants. Virus and fungi are not involved in the curing process of tea leaves.

Correct Option: D

For curing of tea, a bacteria Micrococcus candicans is used. Curing of tea leaves is brought about by the activity of bacteria. It is essentially an oxidation, dry fermentation process, during which water is driven off the green colour is lost and the leaves assume a tougher texture and undergo chemical changes. Mycorrhiza is a mutually beneficial association between fungi and the roots of higher plants. Virus and fungi are not involved in the curing process of tea leaves.

Parthenocarpy is the development of fruits without prior fertilization which results in the formation of seedless fruits. In some plant species, parthenocarpic fruits are produced naturally or they may be induced by treatment of the unpollinated flowers with auxin. Removal of androecium before pollen release is called emasculation which is helpful in preventing unwanted pollination. Vernalized seeds are treated at ion temperature for breaking dormancy. Phenyl Mercuric Acetate is an antitranspirant. Gibberellins and Auxins are known to induce parthenocarpy in plants. If a tomato plant is treated with a low concentration of auxin and gibberellic acid it’ll produce fruits without fertilization i.e. parthenocarpic fruits.

Correct Option: A

Parthenocarpy is the development of fruits without prior fertilization which results in the formation of seedless fruits. In some plant species, parthenocarpic fruits are produced naturally or they may be induced by treatment of the unpollinated flowers with auxin. Removal of androecium before pollen release is called emasculation which is helpful in preventing unwanted pollination. Vernalized seeds are treated at ion temperature for breaking dormancy. Phenyl Mercuric Acetate is an antitranspirant. Gibberellins and Auxins are known to induce parthenocarpy in plants. If a tomato plant is treated with a low concentration of auxin and gibberellic acid it’ll produce fruits without fertilization i.e. parthenocarpic fruits.

Three crops that contribute maximum to global food grain production are Wheat, rice and maize, which belong to the family Poaceae (Graminae).

Correct Option: A

Three crops that contribute maximum to global food grain production are Wheat, rice and maize, which belong to the family Poaceae (Graminae).

Green revolution was possible due to hybridization. Increased chlorophyll extent has no effect on yield of crops. Hybrid plants were dwarf because of selection. Quantitative trait mutations are not involved in hybridization. In 1963, ICAR introduced many selections from CIMMYT include those developed by Norman Borlaug using Norin-10 as the source of dwarfing genes (CIMMYT-Centro International de Mejoramiento de Maiz Y Trigo).

Correct Option: C

Green revolution was possible due to hybridization. Increased chlorophyll extent has no effect on yield of crops. Hybrid plants were dwarf because of selection. Quantitative trait mutations are not involved in hybridization. In 1963, ICAR introduced many selections from CIMMYT include those developed by Norman Borlaug using Norin-10 as the source of dwarfing genes (CIMMYT-Centro International de Mejoramiento de Maiz Y Trigo).

According to Darwin resistance to pesticides has a genetic basis due to presence
of certain alleles. In the presence of pesticides, the insects devoid of the allele for resistance die while the ones having them survive. They are selected by nature.

Correct Option: A

According to Darwin resistance to pesticides has a genetic basis due to presence
of certain alleles. In the presence of pesticides, the insects devoid of the allele for resistance die while the ones having them survive. They are selected by nature.