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  • 1(current)
Q. No.

Match each item in Column I with one item in Column II and chose your answer from the codes given below:

Column I

Column II

I. Sickle cell anemia

II. Polyploidy

III. Darwin finches

IV. Tail in humans

1. Sympatric speciation

2. Balancing selection

3. Adaptive radiation

4. Atavism

Codes:
 

I II III IV
1. 1 2 3 4
2. 2 1 4 3
3. 2 1 3 4
4. 1 2 4 3
Subtopic:  Concept of Speciation |
 63%

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What is true about the isolated small tribal populations? 

1.  There is no change in population size as they have a large gene pool.
2.  There is a decline in population as boys marry girls only from their own tribe.
3.  Hereditary diseases like color blindness do not spread in the isolated population.
4.  Wrestlers who develop strong body muscles in their lifetime pass this character on to their progeny.

Subtopic:  Concept of Speciation |
 58%

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In allopatric speciation, reproductive isolation is initially caused by:

1.behavioral barriers2.postzygotic barriers
3.geographic barriers4.ecological barriers

Subtopic:  Concept of Speciation |
 80%

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The occurrence of endemic species in South America and Australia is because:

1.  these species have been extinct in other regions
2.  of continental separation
3.  there is no terrestrial route to these places
4.  of retrogressive evolution

Subtopic:  Concept of Speciation |
 77%
From NCERT
AIPMT - 2001

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The bones of forelimbs of whales, bats, cheetahs, and men are similar in structure, because:

1.  one organism has given rise to another
2.  they share a common ancestor
3.  they perform the same function
4.  they have biochemical similarities

Subtopic:  Modern Theory of Evolution | Concept of Speciation |
 89%
From NCERT

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One of the important consequences of geographical isolation is:

1. Random creation of new species
2. No change in the isolated fauna
3. Preventing speciation
4. Speciation through reproductive isolation

Subtopic:  Concept of Speciation |
 75%

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Which of the following is the most important precondition for speciation to occur?

1. Reproductive isolation 2. A crash of the population size
3. Adaptive radiation 4. Random mating
Subtopic:  Concept of Speciation |
 59%
From NCERT

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Speciation that occurs when biological populations of the same species become isolated from each other to an extent that prevents or interferes with gene flow is called as:

1.parapatric speciation2.cladogenesis
3.allopatric speciation4.anagenesis

Subtopic:  Concept of Speciation |
 82%

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