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Class 11 | CBSE | BIOLOGY
ASSERTION REASON QUESTIONS
BOARD-ORIENTED ASSERTION–REASONING WORKSHEET
Class 11 Biology – Chapter 1 | 1.2 TAXONOMIC CATEGORIES
(Prepared exactly as asked in CBSE + NEP exams, high-scoring, NCERT-aligned)
ASSERTION–REASONING WORKSHEET
Topic: 1.2 TAXONOMIC CATEGORIES
Directions (as in Board Exam):
Each question contains an Assertion (A) and a Reason (R). Choose the correct option:
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true
QUESTIONS
Q1
Assertion (A): Species is considered the basic unit of classification.
Reason (R): Members of a species share maximum similarities among themselves.
Answer: A
Q2
Assertion (A): Similarities among organisms decrease as we move from species to kingdom.
Reason (R): Higher taxonomic categories include a larger number of organisms.
Answer: A
Q3
Assertion (A): Genus includes a group of closely related species.
Reason (R): Species belonging to the same genus show fewer similarities than those of different genera.
Answer: C
Q4
Assertion (A): Family is a lower taxonomic category than genus.
Reason (R): Family consists of a group of related genera.
Answer: D
Q5
Assertion (A): Division is used instead of phylum in plant classification.
Reason (R): Plants and animals are classified using the same taxonomic terms.
Answer: C
Q6
Assertion (A): Order is an assemblage of families showing some common characters.
Reason (R): Similarities are more at order level than at family level.
Answer: C
Q7
Assertion (A): Classification becomes more complex at higher taxonomic levels.
Reason (R): Common characteristics among organisms decrease at higher levels.
Answer: A
Q8
Assertion (A): Panthera leo and Panthera tigris belong to the same species.
Reason (R): They share the same genus name.
Answer: D
Q9
Assertion (A): Species within a genus are more closely related to each other than to species of another genus.
Reason (R): Species of the same genus share many morphological characters.
Answer: A
Q10
Assertion (A): Kingdom is the lowest category in the taxonomic hierarchy.
Reason (R): It includes organisms with maximum similarities.
Answer: D
Q11
Assertion (A): Taxonomic categories are also known as taxa.
Reason (R): Each taxonomic category represents a unit of classification.
Answer: A
Q12
Assertion (A): Members of a family show fewer similarities than members of a genus.
Reason (R): Family is a higher taxonomic category than genus.
Answer: A
Q13
Assertion (A): Class Mammalia includes orders like Primata and Carnivora.
Reason (R): Class is a higher category than order.
Answer: A
Q14
Assertion (A): Mango and wheat belong to the same class.
Reason (R): Both are flowering plants.
Answer: D
Q15
Assertion (A): Taxonomic hierarchy helps in systematic study of organisms.
Reason (R): It groups organisms based on similarities and dissimilarities.
Answer: A
EXAMINER’S EXPECTATION (IMPORTANT)
✔ Choose option carefully
✔ Do NOT overthink – NCERT logic only
✔ Many students lose marks in A-R → practise is key