biology : class11 Phylogenetic Classification : Importance of Classification, Basis of Classification, Advantages of Classification : Need for Classification MCQ Questions and Answers
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Phylogenetic Classification
MCQ questions and answers.
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MCQ Questions
1. What is the main basis of phylogenetic classification?
A.
Size of organisms
B.
Evolutionary relationships among organisms
C.
Place where organisms live
D.
Colour of organisms
Correct Answer:
Evolutionary relationships among organisms
Explanation:
Phylogenetic classification groups organisms according to their evolutionary relationships and common ancestry.
2. Phylogenetic classification reflects the evolutionary history of organisms in the form of a ____.
A.
Food chain
B.
Life cycle
C.
Phylogenetic tree
D.
Population graph
Correct Answer:
Phylogenetic tree
Explanation:
A phylogenetic tree represents the evolutionary history and relationships among different organisms.
3. Organisms placed in the same phylogenetic group are expected to have a ____.
A.
Common ancestor
B.
Common habitat only
C.
Similar body colour
D.
Same body size
Correct Answer:
Common ancestor
Explanation:
Phylogenetic classification groups organisms that share a common evolutionary ancestor.
4. Which type of classification is based on the evolutionary history of organisms?
A.
Artificial classification
B.
Natural classification
C.
Phylogenetic classification
D.
Numerical classification
Correct Answer:
Phylogenetic classification
Explanation:
Phylogenetic classification specifically uses evolutionary history and ancestry as the basis for grouping organisms.
5. In a phylogenetic tree, a branching point generally represents a ____.
A.
Common ancestor
B.
Change in habitat
C.
Change in body size
D.
Different food source
Correct Answer:
Common ancestor
Explanation:
A branching point in a phylogenetic tree indicates a common ancestor from which different groups evolved.
6. Which evidence is useful for determining phylogenetic relationships?
A.
Evolutionary similarities
B.
Body colour alone
C.
Length of life alone
D.
Number of offspring alone
Correct Answer:
Evolutionary similarities
Explanation:
Similarities inherited from common ancestors help scientists determine phylogenetic relationships.
7. Phylogenetic classification is considered more informative because it shows ____.
A.
Only the external appearance of organisms
B.
The evolutionary connections among organisms
C.
Only the habitats of organisms
D.
Only the number of species in an area
Correct Answer:
The evolutionary connections among organisms
Explanation:
This classification is informative because it reveals how organisms are connected through evolution.
8. Two organisms placed close together on a phylogenetic tree usually have ____.
A.
A more recent common ancestor
B.
Different evolutionary origins
C.
No relationship with each other
D.
Identical habitats
Correct Answer:
A more recent common ancestor
Explanation:
Organisms located close together on a phylogenetic tree generally share a more recent common ancestor.
9. Which statement correctly describes phylogenetic classification?
A.
It groups organisms only by their usefulness to humans
B.
It groups organisms according to their evolutionary relationships
C.
It groups organisms only by their place of discovery
D.
It groups organisms according to their colour
Correct Answer:
It groups organisms according to their evolutionary relationships
Explanation:
The defining feature of phylogenetic classification is the grouping of organisms based on their evolutionary relationships.
10. The study of phylogeny helps us understand the ____ of organisms.
A.
Evolutionary history
B.
Daily activities
C.
Geographical size
D.
Seasonal colour changes
Correct Answer:
Evolutionary history
Explanation:
Phylogeny is the study of the evolutionary history and relationships of organisms.
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