biology : class11 Biodiversity Management : Importance of Classification, Basis of Classification, Advantages of Classification : Need for Classification MCQ Questions and Answers
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Biodiversity Management
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MCQ Questions
1. A conservation agency must decide whether two populations of a threatened organism should be managed as separate evolutionary units. Which classification-based information would be most decisive?
A.
Their similarity in body size alone
B.
Their evolutionary relationships, genetic distinctness, and reproductive isolation
C.
The number of individuals observed in a single season
D.
The habitat colour preferred by both populations
Correct Answer:
Their evolutionary relationships, genetic distinctness, and reproductive isolation
Explanation:
Biodiversity management requires identifying biologically distinct populations accurately. Evolutionary relationships, genetic differences, and reproductive isolation help determine whether populations represent separate conservation units.
2. A newly discovered plant is classified incorrectly with a common, non-threatened species because both have similar leaf shapes. What is the most serious consequence for biodiversity management?
A.
The plant may receive an inappropriate conservation priority
B.
The plant will automatically develop reduced genetic variation
C.
The plant will become unable to reproduce in its natural habitat
D.
The plant will necessarily occupy a different ecological niche
Correct Answer:
The plant may receive an inappropriate conservation priority
Explanation:
Accurate classification supports recognition of rare or endangered organisms. Misclassification can hide their actual distribution, abundance, and conservation status, leading to unsuitable management decisions.
3. Why is a universally accepted scientific naming system especially important when several countries jointly manage a transboundary biodiversity hotspot?
A.
It ensures that every organism has identical ecological requirements
B.
It prevents all genetic variation among populations
C.
It allows conservation records from different regions to refer unambiguously to the same taxon
D.
It eliminates the need for field surveys
Correct Answer:
It allows conservation records from different regions to refer unambiguously to the same taxon
Explanation:
Standardized nomenclature prevents confusion caused by regional common names. This makes biodiversity inventories, threat assessments, and international conservation programmes comparable and coordinated.
4. A reserve contains two visually similar frog species, but only one is vulnerable to a disease. Which classification approach would best improve disease-related biodiversity management?
A.
Classifying both frogs solely by the colour of their skin
B.
Using multiple characters, including morphology, behaviour, distribution, and genetic evidence
C.
Grouping them according to the size of the reserve
D.
Assigning both frogs to one species because they share the same habitat
Correct Answer:
Using multiple characters, including morphology, behaviour, distribution, and genetic evidence
Explanation:
Reliable classification uses several independent characters rather than one superficial feature. Distinguishing closely related species accurately is essential for species-specific monitoring and disease management.
5. Which classification principle most directly helps a conservation planner identify lineages that deserve separate protection because they represent unique evolutionary history?
A.
Grouping organisms only according to geographic proximity
B.
Arranging organisms according to evolutionary relationships and common ancestry
C.
Grouping organisms by their economic usefulness
D.
Arranging organisms according to the time of their discovery
Correct Answer:
Arranging organisms according to evolutionary relationships and common ancestry
Explanation:
Phylogenetic classification reveals relationships and evolutionary distinctness. Protecting evolutionarily unique lineages helps preserve a broader range of biodiversity and evolutionary history.
6. A conservation database lists the same endangered bird under three regional common names. Which advantage of scientific classification would most directly correct the database problem?
A.
It predicts the bird's future mutation rate
B.
It provides a standardized hierarchical identity for the organism
C.
It guarantees that the bird's population will increase
D.
It identifies the bird's preferred food without observation
Correct Answer:
It provides a standardized hierarchical identity for the organism
Explanation:
Scientific classification and nomenclature assign organisms standardized identities within a hierarchy. This avoids duplicate records and improves the accuracy of biodiversity monitoring.
7. Two insect populations are morphologically almost identical but occupy different habitats and show substantial genetic divergence. For biodiversity management, the most appropriate action is to:
A.
Assume they are one management unit because morphology is identical
B.
Investigate whether they represent distinct taxa or conservation units
C.
Remove one population from conservation records
D.
Classify them only according to their common local name
Correct Answer:
Investigate whether they represent distinct taxa or conservation units
Explanation:
Biodiversity classification should integrate morphological, ecological, and genetic evidence. Cryptic diversity may be overlooked if management relies only on visible features, potentially leaving a distinct vulnerable lineage unprotected.
8. How does hierarchical classification assist biodiversity managers during a rapid survey of an ecosystem containing many poorly known organisms?
A.
It enables organisms to be organized into progressively broader groups, allowing information to be compared and managed systematically
B.
It proves that organisms in the same kingdom have identical conservation needs
C.
It replaces the need to identify species in the field
D.
It ensures that every taxonomic group has the same population size
Correct Answer:
It enables organisms to be organized into progressively broader groups, allowing information to be compared and managed systematically
Explanation:
Hierarchy organizes biodiversity from specific taxa to broader groups. This facilitates systematic inventories, comparison of patterns, and prioritization of conservation efforts across large numbers of organisms.
9. An invasive organism is repeatedly mistaken for a native species because of a similar common name. Which classification-based measure would most effectively improve management?
A.
Use its accepted scientific name together with diagnostic taxonomic characters
B.
Record only the local name used by residents
C.
Classify it according to the damage observed in one location
D.
Place it in the same taxon as every organism with a similar appearance
Correct Answer:
Use its accepted scientific name together with diagnostic taxonomic characters
Explanation:
Correct identification using standardized nomenclature and distinguishing characters is essential for detecting, tracking, and controlling invasive species without confusing them with native organisms.
10. A national biodiversity programme must select representative species for long-term monitoring. Which criterion best reflects the management value of classification?
A.
Selecting only the largest organisms in each habitat
B.
Selecting taxa that represent different evolutionary lineages and ecological groups
C.
Selecting species whose names are easiest to pronounce
D.
Selecting organisms discovered most recently, regardless of their distribution
Correct Answer:
Selecting taxa that represent different evolutionary lineages and ecological groups
Explanation:
Classification helps managers recognize the breadth of biological diversity. Monitoring representatives from different lineages and ecological groups provides a more meaningful assessment of biodiversity than selecting organisms by size or naming convenience.
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