Read the following statements and choose the correct option.
Statement A: Similarities in proteins and genes among diverse organisms indicates common ancestry.
Statement B: Humans and chimpanzees also show biochemical similarities.

1. Both statements A and B are correct
2. Both statements A and B are incorrect
3. Only statement A is correct
4. Only statement B is correct

Subtopic:  Introduction to Human Evolution | Evolution of Homo Sapiens | Biochemical Evidences |
 89%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

How many options given in the box are not true for the Darwinian theory of evolution?

Directional variations, Saltation, Minor variations, Inheritance of ‘factors’, Heritable variations, Reproductive fitness
1. Four
2. Two
3. Three
4. Five
Subtopic:  Sources of Variation: 2 |
 60%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

In Lederberg's replica plating experiment, colonies of antibiotic resistant bacteria were observed, which indicates
1. Pre-existing advantageous mutations when selected will result in observation of new phenotypes
2. Exposure to antibiotics causes mutation that confer antibiotic resistance
3. Mutations are directional variations
4. All antibiotic resistant bacteria which exist today are result of artificial selection
Subtopic:  Hardy Weinberg Law |
 58%
Please attempt this question first.
Hints

advertisementadvertisement

Dinosaurs dominated the World in which of the following geological era?
1. Coenozoic
2. Jurassic
3. Mesozoic
4. Devonion
Subtopic:   A BRIEF ACCOUNT OF EVOLUTION |
NEET - 2013
Please attempt this question first.
Hints

The finch species of Galapagos Islands are grouped according to their food sources. Which of the following is not a finch food?
1. Carrion
2. Insects
3. Tree buds
4. Seeds
Subtopic:  Concept of Organic Evolution: Evidence |
 65%
NEET - 2013
Please attempt this question first.
Hints

Oparin of Russia and Haldane of England proposed that:
 
I:  the first form of life could have come from pre-existing non-living organic molecules (e.g. RNA, protein, etc.)
II:  formation of life was preceded by chemical evolution, i.e., the formation of diverse organic molecules from inorganic constituents.
III:  The conditions on earth were – high temperature, volcanic storms, reducing atmosphere containing CH4, NH3, etc.
 
1.  Only I and II are correct.
2.  Only I and III are correct.
3.  Only II and III are correct.
4.  I, II and III are correct.
Subtopic:  Cosmic Evolution | Urey & Miller Experiment | Other Theories of Origin of Life |
 78%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

advertisementadvertisement

Assertion (A): Big bang theory says that the universe is still expanding.
Reason (R): The expansion of the universe caused the decrease in temperature.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic:  Cosmic Evolution |
 54%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Assertion (A): According to Darwin, fitness means reproductive fitness.
Reason (R): Those who are a better fit in the environment will leave more progenies.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic:  Darwin's Theory | Summary of Darwin's Theory | Modern Theory of Evolution |
 87%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Assertion (A): The new forms of life have arisen at different times in the history of the earth.
Reason (R): Studies showed that life forms varied over time and certain life forms are restricted to certain geological timespans.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic:  Concept of Organic Evolution: Evidence |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

advertisementadvertisement

Assertion (A): In convergent evolution, the same structure developed in animals along different directions due to adaptations to different needs.
Reason (R): Homologous structures have similar anatomy but perform different functions.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic:  Concept of Organic Evolution: Evidence |
 64%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.