Students can solve these Class 11 Biology MCQ Questions of The Living World with Answers and Check their preparation level. These Class 11 MCQ Questions of The Living World with answers clear for a speedy correction of the Chapter. MCQ Questions for Class 11 Biology with detailed solutions are ready according to the Latest Syllabus and Exam Pattern.

The living world is arranged based on their morphological highlights. This arrangement of characterization is called scientific categorization.

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Practice MCQ Questions for class 11 Biology

1. The defining characteristic of living beings is

(a) They reproduce
(b) They can digest their food
(c) They respond to external stimuli
(d) They regenerate.

2. What is a homonym?

(a) Identical name of two different taxa
(b) Two or more names of the same taxon
(c) Name given to a taxon in local language
(d) Species name repeats the generic name

3. The maintenance of constant temperature inside the body is an example of
(a) Homeostasis
(b) Negative feedback loop
(c) Both A and B
(d) None of these

4. Preservative liquid used for storing fleshy organs is
(a) FAA
(b) Ethyl alcohol
(c) Acetic acid
(d) Formalin

5. A species was defined as ‘A population of interbreeding individuals which are reproductively isolated from other populations by
(a) J. B. Lamarck
(b) Charles Darwin
(c) Ernst Mayr
(d) Carolus Linnaeus

6 . Systema Nature’ is a book written by
(a) Linnaeus
(b) Charak
(c) John Roy
(d) De Candole

7. Metabolism refers to
(a) Release of energy
(b) Gain of energy
(c) Catabolism
(d) Gain or release of energy.

8. Any type of taxonomic group of organisms is called
(a) Taion
(b) Category
(c) Classification
(d) Rank of hierarchy

9. Musca domestica is the common name of
(a) Housefly
(b) Mosquito
(c) Snail
(d) Ant.

10. The Indian Botanical Garden and the National Botanical Research Institute are located respectively at:

(a) Pune and Howrah

(b) Howrah and Lucknow

(c) Darjeeling and Lucknow

(d) Shimla and Dehradun

11. Species found in different geographical locations are called

(a) Sympatric species
(b) Allopatric species
(c) Sibling species
(d) Morphospecies

12. One of the following functions is exhibited only by green plants and not by animals.
(a) Growth
(b) Photosynthesis
(c) Digestion
(d) Response.

13. In which organism protoplasm and cellular structure is absent
(a) Algae
(b) Virus
(c) Fungi
(d) Bacteria

14. The Darwin of the 20th century is
(a) Aristotle
(b) Ernst Mayr
(c) Carolus Linnaeus
(d) Theophrastus

15. The label of a herbarium sheet does not carry information on

(a) date of collection
(b) name of collector
(c) local names
(d) height of the plant

16. The study of fish culture is called 
(a) ophiology 
(b) herpetology
(c) ichthyology 
(d) pisciculture

17. The ozone layer is found in the
(a) hydrosphere
(b) stratosphere
(c) lithosphere
(d) troposphere

18. ICBN stands for:

(a) Indian Congress of Biological Names
(b) International Code for Botanical Nomenclature
(c) International Congress of Biological Names
(d) Indian Code of Botanical NOmenclature

19. Energy transformation is never \(100\%\) efficient because of
(a) Catabolism
(b) Entropy
(c) Homeostasis
(d) Anabolism

20. Nicotiana is a .........

(a) Species
(b) Sub-species
(c) Genus
(d) Class

21. Biodiversity means-
(a) Number of organisms known
(b) Types of organisms known
(c) Number of species known
(d) All are correct

22. The taxonomic unit ‘Phylum’ in the classification of animals is equivalent to which hierarchical level in the classification of plants?
(a) Class 
(b) Order 
(c) Family 
(d) Division

23. Which of the following is against the rules of ICBN?   

(a) Hand-written scientific names should be underlined.
(b) Every species should have a generic name and a specific epithet.
(c) Scientific names are in Latin and should be italicized.
(d) Generic and specific names should be written starting with small letters.

24. The book ‘Genera Plantarum’ was written by   

(a) Engler and Prantl 
(b) Bentham and Hooker
(c) Bessey
(d) Hutchinson

25. Static concept of species was put forward by   

(a) de Candolle
(b) Linnaeus
(c) Theophrastus
(d) Darwin

 Answer:

1. Answer : (c) They respond to external stimuli

Explanation: There are seven characteristics of living things: movement, breathing or respiration, excretion, growth, sensitivity, and reproduction.

2. Answer : (a) Identical name of two different taxa

Explanation: A homonym is a name that belongs to a taxon and which spells the same as a name belonging to another taxon. There are two types of homonyms called homophones and homographs.

3. Answer : (a) Homeostasis

Explanation: The control of body temperature in humans is a good example of homeostasis in a biological system.

4. Answer :(d) Formalin

Explanation: Preservatives are used to preserve the substances. In the same manner, to prevent biological specimens the preservative is used. These are used to prevent damages to the specimens. Formalin is one the known and famous preservatives which are used for the preservation of biological specimens.

5. Answer : (c) Ernst Mayr

Explanation: A species is defined as a population of interbreeding individuals and reproductively isolated from other populations by Ernst Mayr.

6. Answer : (a) Linnaeus

Explanation: Carl von Linné, or Carl Linnaeus (1707–1788) was a Swedish physician, botanist, and zoologist who created a new system of classification for all living things.

7. Answer : (d) Gain or release of energy

Explanation: Metabolism refers to the whole sum of reactions that occur throughout the body within each cell and that provide the body with energy. This energy gets used for vital processes and the synthesis of new organic material.

8.Answer : (a) Taxon

Explanation: A taxonomic group of any rank is called a taxon. Examples of taxonomic ranks are species, genus, family, order, class, phylum, domain, etc.

9. Answer : (a) Housefly

Explanation:The common name of Housefly is Musca domestica.

10. Answer : (b) Howrah and Lucknow

Explanation: National botanical research institute is located in Lucknow, Uttar Pradesh. The national botanical research institute was made by Kailash Nath Kaul which is named as the National botanical garden.

11. Answer : (b) Allopatric species

Explanation: Allopatric species can inhabit different geographical areas. - Geographical barriers such as mountains, rivers, buildings, oceans, glaciers, valleys, etc., isolates biological populations of the same species. Some other causes behind allopatric speciation are social differences and emigration.

12. Answer : (b) Photosynthesis

Explanation:Photosynthesis is exhibited by plants only. Photosynthesis is the function exhibited only by Green plants because they contain chlorophyll which is absent in the animal body and also animals are heterotrophs there is no chance of preparing their own food.

13.Answer : (b) Virus

Explanation: Cell membrane, protoplasm, ribosome, etc are absent in viruses.

14.Answer : (b) Ernst Mayr

Explanation: Ernst Mayr is understood as Darwin of the 20th century. He's referred to as the father of the 20th century as he contributed tons to science. He was the number one evolutionary biologist in his time.

15. Answer : (d) height of the plant

Explanation: Herbarium is an important taxonomical aid that comprises a collection of preserved plants. These are used for research and are stored systematically, organized, and cataloged. It has no information about plant height. So, the correct option is 'Height of the plant'.

16.Answer :(d) pisciculture

Explanation: The breeding, rearing, and transplantation of fish by artificial means is called pisciculture, in other words, fish farming. It is the principal form of aquaculture, while other methods may fall under mariculture. It involves raising fish commercially in tanks or enclosures, usually for food.

17. Answer : (b) stratosphere

Explanation: The ozone layer is the common term for the high concentration of ozone that is found in the stratosphere around 15–30km above the earth's surface. It covers the entire planet and protects life on earth by absorbing harmful ultraviolet-B (UV-B) radiation from the sun.

18. Answer : (b) International Code for Botanical Nomenclature

Explanation: International Code of Botanical Nomenclature (ICBN); the name was changed at the International Botanical Congress in Melbourne in July 2011.

19.Answer : (b) Entropy

Explanation: Entropy changes in a system restrict the engine from transferring all its energy into work. Hence energy transfers is never \(100\%\) efficient due to entropy.

20. Answer : (c) Genus

Explanation: Nicotiana is a Genus.

21. Answer : (d) All are correct

Explanation: The term biodiversity (from “biological diversity”) refers to the variety of life on Earth at all its levels, from genes to ecosystems, and can encompass the evolutionary, ecological, and cultural processes that sustain life.

22. Answer : (d) Division

Explanation: The taxonomic unit 'Phylum' in the classification of animals is equivalent to the taxonomic unit 'Division' in the classification of the plants.

23. Answer :  (d) Generic and specific names should be written starting with small letters.

Explanation: Accordingly, the generic name is the genus of the species and is written by starting with a capitalized letter. Both the generic name and the specific epithet are in italicized form.

24. Answer : (b) Bentham and Hooker

Explanation: In the book called 'Genera Plantarum', Bentham and Hooker gave a comprehensive system of classification of seed plants, and it is regarded as the most convenient system of classification because of its practical utility.

25. Answer : (b) Linnaeus

Explanation: Linnaeus put forward the static concept of species. Linnaeus developed a"binomial nomenclature system

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