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All Physics Chemistry Botany Zoology

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Big Bang theory attempts to explain

A. The origin of universe B. The origin of Earth C. The origin of life D. The origin of environment

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Explanation

NCERT page number 127,Para-1

7.1 Origin of Life

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Which of the following is not true about Big Bang theory?

A. A singular huge explosion B. Universe expanded and temperature came down C. Hydrogen and Helium alongwith this expansion D. The gases condensed under gravitation and formed the galaxies of the present day universe.

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Explanation

NCERT page number 127,Para-1

7.1 Origin of Life

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Which of the following is true regarding early earth?

Earth was supposed to have been formed about 4.5 billion years back.

The atmosphere of early earth was full of water vapour.

The surface of earth was covered by water vapour, methane and carbondioxide, the three compounds, formed from molten mass.

The UV rays from the sun broke up water into hydrogen and oxygen and lighter oxygen escaped.

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Explanation

NCERT page number 127,Para-1

7.1 Origin of Life

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…….combined with ….. and….. to form water, CO2 and others.

A. Oxygen, ammonia and Methane B. Hydrogen, ammonia and Methane C. Hydrogen, Methane and ammonia D. Oxygen, Methane and hydrogen

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Explanation

NCERT page number 127,Para-1

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Which of the following theory is dismissed by Louis Pasteur's Experiment?

A. Theory of panspermia B. Theory of spontaneous generation C. Theory of special creation D. Catastrophic theory

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Explanation

NCERT page number 127, Para-2

7.1 Origin of Life

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Oparin of…… and Haldane of ….. proposed that the first form of life could have come from pre existing …………

A. Russia, England, non-living inorganic molecules B. England, Russia, living organic matter C. Russia, England, non-living organic molecules D. England, Russia, life

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Explanation

NCERT page number 127, Para-3

7.1 Origin of Life

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The formation of diverse organic molecules from inorganic molecules was proposed by

A. L. Miller B. Oparin C. Haldane D. Both B and C

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Explanation

NCERT page number 127, Para-3

7.1 Origin of Life

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Which of the following conditions was not there in the Earth at the time of origin of first life form?

A. High Temperature B. Volcanic storms C. Reducing atmosphere D. Oxygen,Methane and Ammonia in the environment

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Explanation

NCERT page number 127, Para-3

7.1 Origin of Life

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The first cellular form of life originated

A. Before 2000 million years ago B. At 2000 million years ago C. Before 200 million years ago D. Not before 2000 million years ago

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Explanation

NCERT page number 128,Para-1

7.1 Origin of Life

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The first form of life were not

A. Single cells B. in water environment only C. originated till about 200million years ago D. Both A and B

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Explanation

NCERT page number 128,Para-1

7.1 Origin of Life

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