Theory of Abiogenesis

Q.

How biogenesis is different From Abiogenesis?

Q.

Assertion: The first living organisms were heterotrophs.

Reason: They were surrounded by preformed organic molecules which they used as food.

Read the assertion and reason statements carefully and answer the question on the basis of the following options.

1. Assertion is True, Reason is True; Reason is a correct explanation for Assertion.

2. Assertion is True, Reason is True; Reason is not a correct explanation for Assertion.

3. Assertion is True, Reason is False.

4. Assertion is False, Reason is True.

Q. Life originated

1. According to a combination of various mythological theories
2. Due to various inorganic materials transforming into life everyday
3. From pre-existing living organisms
4. None of the above

Q. The concept of chemical evolution is based on:

1. Interaction of water, air and clay under intense heat
2. Effect of solar radiation on chemicals
3. Origin of life by combination of chemicals under suitable environmental conditions
4. Crystallisation of chemicals

Q.

Swan-necked flask experiment disproved:

1. Biogenesis

2. Abiogenesis

3. Gene therapy

4. Evolution

Q. There is no life on moon due to the absence of

1. $O_2$
2. Water
3. Light
4. Temperature

Q. The presence of oxygen was the reason for the origin of photoautotrophs on primitive Earth.

1. False
2. True

Q.

According to Oparin, which one of the following was not present in the primitive atmosphere of the earth :

1. Oxygen

2. Hydrogen

3. Water vapour

4. Methane

Q. The most accepted theory on the origin of life, is the theory of biochemical evolution.

1. True
2. False

Q. To which of the following categories did the first formed cells of the primitive earth belong?

1. Autotrophs
2. Chemotrophs
3. Saprotrophs
4. None of these