The occurrence of endemic species in South America and Australia is due to  

1. Extinction of these species from other regions

2. Continental separation

3. No terrestrial route to these places

4. Retrogressive evolution 

Subtopic:  Concept of Speciation |
 74%
From NCERT
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In a sympatric speciation, there is:

1. geographical isolation between groups of population
2. no geographical isolation between groups of population
3. reproductive isolation of a subpopulation in the midst of the parent population 
4. geographical isolation bout no reproductive isolation
Subtopic:  Concept of Speciation |
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The formation of a new species through change in a single lineage is known as:

(1) Anagenesis, or phyletic evolution

(2) Cladogenesis, or divergent evolution

(3) Convergent evolution

(4) Allopatry

Subtopic:  Concept of Speciation |
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Most often the factor that initiates the speciation of two populations is:

(1) Geographic isolation

(2) Inability of the gametes to fuse

(3) Different courtship behaviours

(4) Different copulatory organs

Subtopic:  Concept of Speciation |
 82%
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Reproduction isolation in sympatric speciation develops without a 

(1) Geographic barrier

(2) Barrier to gene flow

(3) Change in chromosome number

(4) Barrier to mating

Subtopic:  Concept of Speciation |
 59%
AIIMS - 2016
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Speciation of sympatric species is due to

(1) geographic isolation

(2) reproductive isolation

(3) isolation/separation

(4) migration

Subtopic:  Concept of Speciation |
 60%
AIIMS - 2013
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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             1. Sympatric speciation
II. Polyploidy                       2. Balancing selection
III. Darwin finches               3. Adaptive radiation
IV. Tail in humans                4. Atavism
Codes:
        I    II   III    IV
A.     1    2    3     4
B.     2    1    4     3
C.     2    1    3     4
D.     1    2    4     3

Subtopic:  Embryological Evidence of Evolution | Darwin's Theory | Natural Selection | Concept of Speciation |
 60%
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One of the important consequences of geographical isolation is:

1. no change in the isolated fauna

2. preventing speciation

3. speciation through reproductive isolation

4. random creation of new species

Subtopic:  Concept of Isolation | Concept of Speciation |
 67%
AIPMT - 2007
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Which one of the following is not a living fossil?

1. King crab

2. Sphenodon

3. Archaeopteryx

4. Peripatus

Subtopic:  Concept of Speciation | Genetic Basis of Adaptation |
 55%
AIPMT - 2006
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Speciation occurs most frequently is populations that are
1. Sympatric 
2. Undergoing disruptive selection

3. Allopatric
4. Not geographically separated
Subtopic:  Concept of Speciation |
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