Solved Examples: Evolution Notes | Study NEET Revision Notes - NEET

NEET: Solved Examples: Evolution Notes | Study NEET Revision Notes - NEET

The document Solved Examples: Evolution Notes | Study NEET Revision Notes - NEET is a part of the NEET Course NEET Revision Notes.
All you need of NEET at this link: NEET

Q.1. According to one of the most widely accepted theories the earth’s atmosphere, before any life had originated on this planet, consisted of a mixture of     [CPMT 1981, 84, 2002]
(a) Water vapour, H2, NH3 and CH4 
(b) H2, CO2, NH3 and CH         
(c) CO2, NH3, CH4 and water vapour
(d) CH4, O2 and water vapour

Ans: a
Solution:
According to one of the most widely accepted theories the earth’s atmosphere, before any life had originated on this planet, consisted of a mixture of Water vapour, H2, NH3 and CH4.

Q.2. If there was no CO2 in the earth's atmosphere, the temperature of earth's surface would be      [CBSE PMT 1998]
(a) Same as present
(b) Less than the present
(c) Higher than the present
(d) Dependent on the amount of oxygen in the atmosphere

Ans: b
Solution:
If there was no CO2 in the earth's atmosphere, the temperature of earth's surface would be less than the present

Q.3. Which of the following is not atavistic in humans     [CPMT 2001]
(a) Tail in some babies  
(b) Enlarged canines
(c) Six fingers        
(d) Dense body hair
Ans: 
c
Solution:
Having six fingers is not atavistic in humans.

The document Solved Examples: Evolution Notes | Study NEET Revision Notes - NEET is a part of the NEET Course NEET Revision Notes.
All you need of NEET at this link: NEET

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