Tag: concept of life

Questions Related to concept of life

When did life originate on earth?

biology concept of life theories of the origin of life origin of life the origin of cells and cell division

  1. 2 billion years ago

  2. 3.5 billion years ago

  3. 1 billion years ago

  4. None of the above

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Correct Option: B
Explanation:

The origin of life on earth a scientific problem which is not yet solved. There are plenty of ideas but few clear facts.

It is generally agreed that all life today evolved by common from a single primitive lifeform. It is not known how this early form came about, but scientists think it was a natural process which took place perhaps 3,900 million years ago. 

So, the correct answer is "3.5 billion years ago".

At the times of origin of life, the structure temperature of earth was :

biology concept of life theories of the origin of life origin of life the origin of cells and cell division

  1. $100^o C $

  2. $50-60^o C $

  3. $85-40^o C $

  4. $10-15^o C $

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Correct Option: B

Biopoiesis is :

biology concept of life theories of the origin of life origin of life the origin of cells and cell division

  1. Organic evolution

  2. Evolution of organic elements

  3. Origin of life

  4. Life supporting system

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Correct Option: C

Atmosphere of earth just before the origin of life consisted of  ___________________.

biology concept of life theories of the origin of life origin of life the origin of cells and cell division

  1. Water vapours, $CH _4 , NH _3 $ and Oxygen

  2. $ CH _4 , NH _3 $ and $CH _4$

  3. $ CO _2 , NH _3 , H _2 $ and water vapours

  4. $ CH _4 , O _3 , O _2 $ and water vapours

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Correct Option: C

Which was absent/ least abundant in the atmosphere at the time of origin of life ?

biology concept of life theories of the origin of life origin of life the origin of cells and cell division

  1. $NH _3$

  2. $H _2$

  3. $O _2$

  4. $CH _4$

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Correct Option: C

Which is the most important for origin of life ?

biology concept of life theories of the origin of life origin of life the origin of cells and cell division

  1. Oxygen

  2. Water

  3. Nitrogen

  4. Carbon

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Correct Option: B

Oldest rock is dated :

biology concept of life theories of the origin of life origin of life the origin of cells and cell division

  1. 3.0 billion years

  2. 3.8 billion years

  3. 4.8 billion years

  4. 5.7 billion years

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Correct Option: B

Following are the two statements about the origin of the life :
(a) The earliest organisms that appeared on the earth were nongreen and presumably anaerobic.
(b) The first autotrophic organisms were the chemoautotrophic that never released oxygen. 
Of the above statements which one of the following options is correct?

biology concept of life theories of the origin of life origin of life the origin of cells and cell division

  1. Both (a) and (b) are false.

  2. (a) is correct but (b) is false.

  3. (b) is correct but (a) is false.

  4. Both (a) and (b) are correct.

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Correct Option: D

Prctobiogenesis occurred :

biology concept of life theories of the origin of life origin of life the origin of cells and cell division

  1. 1.2 billion years ago

  2. 2.0 billion years ago

  3. 2.5 billion years ago

  4. More than 3.5 billion years ago

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Correct Option: D

Origin of first life is

biology concept of life theories of the origin of life origin of life the origin of cells and cell division

  1. Biogeny

  2. Biopoiesis

  3. Cognogeny

  4. Chemogeny.

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Correct Option: A