NEET UG MCQs: Class XI Biology - The Living World

🌿 Test your NEET UG prep with these MCQs on The Living World! 📖✨ Based on NCERT Class XI Biology, these questions will help you strengthen your concepts of biodiversity, taxonomy, and classification.

1. NEET UG MCQs: Class XI Biology – The Living World By Adhiraj Kakkar

2. MCQ 1: The Darwin of 20th Century Q: Who is known as "The Darwin of the 20th century" and awarded the "Triple Crown of Biology"? Carolus Linnaeus Ernst Mayr Charles Darwin Robert Whittaker Correct: b) Ernst Mayr Explanation: Ernst Mayr received the Balzan Prize, International Prize, and Crafoord Prize.

3. MCQ 2: Features of Living Organisms Q: Which of the following is NOT a defining feature of living organisms according to the text? Metabolism Reproduction Self-consciousness Ability to sense environment Correct: b) Reproduction Explanation: Many organisms (mules, sterile bees) don't reproduce.

4. MCQ 3: Unicellular Growth Q: In unicellular organisms, what is the relationship between growth and reproduction? They are independent processes Growth occurs without cell division Growth and reproduction are synonymous Reproduction occurs without growth Correct: c) Growth and reproduction are synonymous Explanation: In unicellular organisms, growth and reproduction occur together through cell division.

5. MCQ 4: Non-living Growth Q: Which is an example of growth in non-living organisms? Cell division in bacteria Increase in size of mountains Reproduction in mules Metabolism in humans Correct: b) Increase in size of mountains Explanation: Mountains, boulders, and sand mounds exemplify non-living growth.

6. MCQ 5: Universal Life Feature Q: What is the defining feature of all living organisms without exception? Reproduction Metabolism Growth Self-replication Correct: b) Metabolism Explanation: Metabolism is a defining feature of all living organisms without exception.

7. MCQ 6: Metabolic Reactions Q: Which of the following is true about isolated metabolic reactions in vitro? They are living things They lack chemical reactions They are living reactions but not living things They do not involve enzymes Correct: c) They are living reactions but not living things Explanation: Isolated metabolic reactions in vitro are not living things but are living reactions.

8. MCQ 7: Human Uniqueness Q: What is the only unique character exclusive to human beings? Consciousness Self-consciousness Metabolism Ability to sense environment Correct: b) Self-consciousness Explanation: Self-consciousness is unique to humans, while consciousness exists in all living organisms.

9. MCQ 8: Binomial Nomenclature Q: Who developed the Binomial Nomenclature system? Ernst Mayr Carolus Linnaeus Charles Darwin Robert Hooke Correct: b) Carolus Linnaeus Explanation: Carolus Linnaeus developed the Binomial Nomenclature system.

10. MCQ 9: Scientific Names Q: In biological nomenclature, what does the first word in a scientific name represent? Species epithet Genus Family Author Correct: b) Genus Explanation: The first word represents the genus, while the second denotes the species epithet.

11. MCQ 10: Writing Biological Names Q: How are biological names typically written? In English and bold In Latin and italics In Greek and underlined In Sanskrit and plain text Correct: b) In Latin and italics Explanation: Biological names are generally in Latin and written in italics.

12. MCQ 11: Scientific Name Components Q: What appears after the specific epithet in a scientific name? Genus name Family name Name of the author Order name Correct: c) Name of the author Explanation: The author's name follows the species epithet.

13. MCQ 12: Biodiversity Numbers Q: What is the approximate number of species referred to as biodiversity in the text? 1.2–1.5 million 1.7–1.8 million 2.0–2.5 million 3.0–3.5 million Correct: b) 1.7–1.8 million Explanation: Current documented biodiversity is approximately 1.7-1.8 million species.

14. MCQ 13: Plant Nomenclature Q: Which nomenclature code governs the naming of plants? ICZN ICBN IUCN ICNB Correct: b) ICBN Explanation: ICBN (International Code for Botanical Nomenclature) governs plant naming.

15. MCQ 14: Linnaeus Publication Q: What is the title of the publication by Carolus Linnaeus mentioned in the text? Origin of Species Systema Naturae Taxonomy Flora Indica Correct: b) Systema Naturae Explanation: Linnaeus published his classification system in "Systema Naturae".

16. MCQ 15: Plant Families Q: Which taxonomic category includes plant families like Convolvulaceae and Solanaceae? Class Order Phylum Genus Correct: b) Order Explanation: These families belong to the order Polymoniales.

17. MCQ 16: Taxonomic Hierarchy Q: What is the correct ascending order of taxonomic hierarchy? Kingdom → Phylum → Class → Order → Family → Genus → Species Species → Genus → Family → Order → Class → Phylum → Kingdom Genus → Species → Family → Order → Class → Kingdom → Phylum Order → Family → Genus → Species → Class → Phylum → Kingdom Correct: b) Species → Genus → Family → Order → Class → Phylum → Kingdom Explanation: This is the correct ascending order of taxonomic hierarchy.

18. MCQ 17: Housefly Classification Q: To which order does the housefly belong? Lepidoptera Diptera Coleoptera Hymenoptera Correct: b) Diptera Explanation: The housefly belongs to the order Diptera.

19. MCQ 18: Herbarium Sheet Q: What is the standard size of a herbarium sheet? 25 × 35 cm 29 × 41.5 cm 30 × 45 cm 20 × 30 cm Correct: b) 29 × 41.5 cm Explanation: The standard herbarium sheet size is 29 × 41.5 cm.

20. MCQ 19 & 20: Botanical Gardens and Taxonomic Keys Q: What is a pair of contrasting characters in a taxonomic key called? Lead Couplet Flora Monograph Correct: b) Couplet Explanation: A pair of contrasting characters in a key is called a couplet.