Many transplanted seedlings do not grow because -

During a thunderstorm, the thunder in the skies is produced by the

1. Meeting of cumulonimbus clouds in the sky
2. Lightning that separates the nimbus clouds
3. Violent upward movement of air and water particles

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The efforts to detect the existence of Higgs boson particle have become frequent news in the recent past. What is /are the importance/importance of discovering this particle?

1. It will enable us to understand as to why elementary particles have mass.
2. It will enable us in the near future to develop the technology to transferring matter from one point to another without traversing the physical space between them.
3. It will enable us to create better fuels for nuclear fission.

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Consider the following animals:

1. Sea cow
2. Sea horse
3. Sea lion

Which of the above is/are mammal/mammals?

Which of the following statements is/are correct?

1. Viruses lack enzymes necessary for the generation of energy.
2. Viruses can be cultured in any synthetic medium.
3. Viruses are transmitted from one organism to another by biological vectors only.

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Recombinant DNA technology (Genetic Engineering) allows genes to be transferred

1. Across different species of plants.
2. From animals to plants.
3. From microorganisms to higher organisms.

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Mycorrhizal Biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to -

1. Resist drought and increase absorptive area
2. Tolerate extremes of pH
3. Resist disease infestation

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Consider the following phenomena:

1. Size of the sun at dusk
2. Colour of the sun at dawn
3. Moon being visible at dawn
4. The twinkle of stars in the sky
5. Polestar being visible in the sky

Which of the above are optical illusions?

Ball bearings are used in bicycles, cars, etc., because

Improper handling and storage of cereal grains and oilseeds result in the production of toxins known as aflatoxins which are not generally destroyed by normal cooking process. Aflatoxins are produced by

Rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena are responsible for this?

1. Dispersion
2. Refraction
3. Internal reflection

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Which of the following diseases can be transmitted from one person to another through tattooing?

1. Chikungunya
2. Hepatitis B
3. HIV-AIDS

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Fruits stored in a cold chamber exhibit longer storage life because -

With reference to the usefulness of the by-products of the sugar industry, which of the following statements is/are correct?

1. Bagasse can be used as biomass fuel for the generation of energy.
2. Molasses can be used as one of the feedstocks for the production of synthetic chemical fertilizers.
3. Molasses can be used for the production of ethanol.

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The known forces of nature can be divided into four classes, viz, gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?

Consider the following minerals -

1. Calcium
2. Iron
3. Sodium

Which of the minerals given above is/are required by the human body for the contraction of muscles?