Class 11 Biology – The Living World MCQs with Answers
Revising The Living World for Class 11 Biology can feel stressful because the chapter has many terms, rules of naming, and classification levels. Reading notes once is not enough when exams are near and you need quick recall. This page gives you exam-style MCQs with answers and short explanations so you can revise faster and spot weak areas. The questions match what is commonly asked in school tests and CBSE-style papers, especially around taxonomy, binomial nomenclature, and the hierarchy of categories.
Core Content (MCQs)
Question 1
Which statement is NOT true about taxonomic categories?
A. Taxonomic categories are distinct biological entities, not just morphological aggregates. B. Each taxonomic category represents a rank called a taxon. C. Order is a lower category than family in the taxonomic hierarchy. D. Species is a group of individual organisms with fundamental similarities.
Answer: C
Explanation: In the hierarchy, family is below order. Many families together form an order.
Why the other options are wrong (quick check):
- A: Categories are treated as real units of classification, not just “groups by look”.
- B: A taxonomic category at any rank is called a taxon.
- D: Species is the basic unit, sharing fundamental similarities.
Question 2
Assertion (A): Scientific names are written in Latin or Latinised form. Reason (R): Latin is a dead language and does not change, making it suitable for universal naming.
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.
Answer: A
Explanation: Latin (or Latinised words) keeps names stable across countries and languages, so the same organism has one accepted scientific name.
Why the other options are wrong (quick check):
- B: R directly explains why Latin is used.
- C/D: Both statements are correct.
Question 3
Assertion (A): Kingdom is the highest taxonomic category in the hierarchy. Reason (R): As we move from species to kingdom, the number of common characteristics among members increases.
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.
Answer: C
Explanation: Kingdom is the highest category in the standard school hierarchy, but common characteristics decrease as you move upwards (species → kingdom).
Why the other options are wrong (quick check):
- A/B: R is incorrect.
- D: A is correct.
Revision Tip: In taxonomy, “higher rank = broader group = fewer common features.” Use this line to avoid mistakes in assertion–reason questions.
Question 4
Which taxonomic category represents the lowest rank in the hierarchy?
A. Genus B. Species C. Family D. Order
Answer: B
Explanation: Species is the lowest and most specific rank, grouping organisms with fundamental similarities.
Why the other options are wrong (quick check):
- A/C/D: Genus, family, and order are higher and include many species.
Question 5
The scientific name Mangifera indica Linn. indicates that:
A. Mangifera is the genus, indica is the species epithet, and Linn. is the author who described it. B. indica is the genus, Mangifera is the species, and Linn. is the location. C. Linn. is the genus and Mangifera indica is the species. D. Mangifera indica is the family name and Linn. is the genus.
Answer: A
Explanation: Binomial nomenclature uses genus + specific epithet, and the author’s abbreviated name is written after the scientific name.
Why the other options are wrong (quick check):
- B: Genus is the first word; the author is not a location.
- C/D: Linn. is the author abbreviation, not a genus or family.
Question 6
Assertion (A): The genus Panthera includes species like Panthera leo and Panthera tigris. Reason (R): Species within a genus share more similarities with each other than with species of other genera.
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.
Answer: A
Explanation: A genus groups closely related species; lion and tiger share key features, so both are placed under Panthera.
Why the other options are wrong (quick check):
- B: R explains the basis of grouping into a genus.
- C/D: Both A and R are correct.
Revision Tip: Remember the order: Species → Genus → Family → Order → Class → Phylum → Kingdom. Write it once before starting MCQs to reduce silly errors.
Question 7
Why is it necessary to use scientific names instead of local names?
A. Local names vary from place to place and can cause confusion. B. Scientific names are easier to pronounce. C. Local names are always in Latin. D. Scientific names are given only to animals.
Answer: A
Explanation: A single organism can have many local names across languages. Scientific names provide one universal name.
Why the other options are wrong (quick check):
- B: Pronunciation is not the reason.
- C: Local names are usually in local languages.
- D: Scientific names exist for plants, animals, and microbes.
Question 8
Which option correctly represents a scientific name in binomial nomenclature?
A. Genus name followed by specific epithet. B. Specific epithet followed by genus name. C. Family name followed by genus name. D. Order name followed by family name.
Answer: A
Explanation: The first word is the genus (capitalised) and the second is the specific epithet (small letter), like Mangifera indica.
Why the other options are wrong (quick check):
- B: The order is reversed.
- C/D: Family and order are higher ranks, not the two-part name.
Question 9
Which sequence shows the correct taxonomic hierarchy from lower to higher?
A. Species → Genus → Family → Order → Class → Phylum → Kingdom B. Kingdom → Phylum → Class → Order → Family → Genus → Species C. Genus → Species → Family → Order → Class → Phylum → Kingdom D. Species → Family → Genus → Order → Class → Phylum → Kingdom
Answer: A
Explanation: The hierarchy moves from specific to broad: species at the bottom, kingdom at the top.
Why the other options are wrong (quick check):
- B: This is the reverse order.
- C: Species should come before genus.
- D: Genus and family are swapped.
Revision Tip: If you get confused, remember: “G-F-O-C-P-K” after species (Genus, Family, Order, Class, Phylum, Kingdom).
Question 10
Which is NOT a rule of scientific nomenclature (ICBN)?
A. Scientific names are written in italics (or underlined when handwritten). B. Genus starts with a capital letter and the specific epithet with a small letter. C. The specific epithet is always capitalised. D. Scientific names are generally Latin or Latinised.
Answer: C
Explanation: The specific epithet begins with a small letter. Only the genus name is capitalised.
Why the other options are wrong (quick check):
- A/B/D: These are standard rules used in textbooks and exams.
You may also practice: Class 11 Biology – The Living World MCQs (Difficulty-wise)
After you finish, try re-answering the questions you got wrong without looking at the explanation.