CBSE/NCERT/Exercises/Class_11_Biology
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Exercises and Questions on The Living World - NCERT Class 11 Biology
Subject: Biology
Class: 11
Topic: The Living World
The number of species that are known and described range between: a) 1.5-1.6 million b) 1.7-1.8 million c) 1.9-2.0 million d) 2.1-2.2 million
ICBN stands for: a) International Code for Biological Nomenclature b) International Code for Botanical Nomenclature c) International Class for Biological Nomenclature d) International Class for Botanical Nomenclature
Binomial nomenclature was given by: a) Ernst Mayr b) Carolus Linnaeus c) Charles Darwin d) Lamarck
In Mangifera indica Linn., 'Linn.' indicates: a) Latin origin b) Linnaeus described it first c) Locality of the plant d) Type of species
The basic unit of classification is: a) Genus b) Species c) Order d) Kingdom
Which of the following represents the correct sequence of taxonomic categories in ascending order? a) Species → Genus → Family → Order → Class → Phylum → Kingdom b) Kingdom → Phylum → Class → Order → Family → Genus → Species c) Species → Genus → Order → Family → Class → Phylum → Kingdom d) Species → Genus → Family → Class → Order → Phylum → Kingdom
Taxonomy includes: a) Identification b) Nomenclature c) Classification d) All of these
Systematics takes into account: a) Morphological characters b) Evolutionary relationships c) Ecological information d) None of these
The scientific name of housefly is: a) Homo sapiens b) Mangifera indica c) Musca domestica d) Triticum aestivum
Which category includes related orders? a) Family b) Class c) Phylum d) Genus
1. Why are living organisms classified? Answer: Living organisms are classified to make the study of millions of diverse life forms systematic, easy, and convenient. Classification helps in identifying similarities and differences among organisms and establishes relationships between different groups.
2. Why are the classification systems changing every now and then? Answer: Classification systems change because new organisms are constantly being discovered. Additionally, as our understanding of evolutionary relationships, genetic information, and internal structures improves with new technologies, we need to update the classification to reflect these scientific advancements.
3. What different criteria would you choose to classify people that you meet often? Answer: Criteria could include:
4. What do we learn from identification of individuals and populations? Answer: Identification helps us learn about the specific characteristics, habitats, and behaviors of individuals and populations. It allows us to distinguish one species from another, understand its ecological role, and determine its evolutionary relationship with other organisms.
5. Given below is the scientific name of Mango. Identify the correctly written name.
6. Define a taxon. Give some examples of taxa at different hierarchical levels. Answer: A taxon (plural: taxa) is a scientific term for any category or rank in the taxonomic hierarchy. Examples:
7. Can you identify the correct sequence of taxonomical categories? (a) Species → Order → Phylum → Kingdom (b) Genus → Species → Order → Kingdom (c) Species → Genus → Order → Phylum Answer: (c) Species → Genus → Order → Phylum is the correct sequence (though some levels are skipped, the relative order is correct).
8. Try to collect all the currently accepted meanings for the word ‘species’. Discuss with your teacher the meaning of species in case of higher plants and animals on one hand, and bacteria on the other hand. Answer:
9. Define and understand the following terms: (i) Phylum (ii) Class (iii) Family (iv) Order (v) Genus Answer:
10. Illustrate the taxonomical hierarchy with suitable examples of a plant and an animal. Answer:
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