CBSE Class 11 Biology The Living World Notes

Download CBSE Class 11 Biology The Living World Notes in PDF format. All Revision notes for Class 11 Biology have been designed as per the latest syllabus and updated chapters given in your textbook for Biology in Standard 11. Our teachers have designed these concept notes for the benefit of Grade 11 students. You should use these chapter wise notes for revision on daily basis. These study notes can also be used for learning each chapter and its important and difficult topics or revision just before your exams to help you get better scores in upcoming examinations, You can also use Printable notes for Class 11 Biology for faster revision of difficult topics and get higher rank. After reading these notes also refer to MCQ questions for Class 11 Biology given our website

Revision Notes for Class 11 Biology The Living World

Class 11 Biology students should refer to the following concepts and notes for The Living World in standard 11. These exam notes for Grade 11 Biology will be very useful for upcoming class tests and examinations and help you to score good marks

The Living World Notes Class 11 Biology

The Living World MCQ Questions with Answers Class 11 Biology

Question- The simplest amino acid is:

a. Aspartic acid

b. Tyrosine

c. Lysine

d. Glycine


Question-The word systematics is derived from

a. Greek word systema

b. Italic word systema

c. Latin word systema

d. English word systema


Question-Which of the following taxonomic categories contains organisms least similar to one another?

a Genera

b. Family

c. Class

d. Species


Question-Improvement of human race through improvement of human environment is:

a. Anthropology

b. Euthenics

c. Euphenics

d. Eugenics


Question- Taxon represents:

a. Rank in classification

b. Basic unit of classification

c. Both of these

d. None of these


Question- As we go lower from kingdom to species the number of common characteristics goes on

a. Increasing

b. Remain unchanged

c. Decreasing

d. Sometimes decreasing


Question-Thesuffix – inae signifies the rank:

a. Tribe

b. Subtribe

c. Suborder

d. Family


Question-A prediction made by a scientist based on his observation is known as:

a. Law

b. Principle

c. Theory

d. Hypothesis


Question- Glucose in taken in test tube and acted upon by hexokinase enzyme. Resulting substrate is glucose - 6 - phosphate. This isolated metabolic reaction is:

a. Occurring in test tube which can be considered as living

b. Considered to be in vivo

c. Considered to be in vitro and living reaction.

d. Considered as non-living reaction


Question-Species living in different geographical areas are called:

a. Allochronic

b. Allopatric

c. Sympatric

d. Siblings


Question-In Mangifera indica Linn. indica refers to

a. Genus

b. Author

c. Family

d. Species


Question- Basis of Taxonomy are:

a. Identification - Characterization - Classification -Nomenclature

b. Characterization - Identification - Classification -Nomenclature

c. Classification - Characterization - Identification -Nomenclature

d. Nomenclature - Classification - Identification -characterization


Question-Edaphology is:

a. Study of soils

b. Study of amphibians

c. Study of snakes

d. Study of elephants


Question-The scientific name of banyan is written as Ficus bengalensis L. which of the following is a correct statement regarding this?

a. Letter L signifies Latin language.

b. The name should be reverse with bengalensis preceding Ficus

c. Letter L signifies taxonomist Linnaeus

d. Bengalensis is generic name


Question-Systematics takes accounts:

a. Evolutionary relationship between organisms.

b. Breeding relationship between organisms.

c. Economic relationship between organisms.

d. None of these


Question-Term biology was introduced by:

a. Aristotle

b. Darwin

c. John Ray

d. Lamarck and Treviranus


Question- Term classification was given by:

a. A.P de Condolle

b. Norman E. Borloug

c. Tansley

d. None of these


Question- Which of the following combinations is correct for wheat ?

a. Genus : Triticum, Family : Anacardiaceae, Order : Poales, Class : Monocotyledonae

b. Genus : Triticum, Family : Poaceae, Order : Poales,Class : Dicotyledonae

c. Genus : Triticum, Family : Poaceae, Order : Sapindales, Class : Monocotyledonae

d. Genus : Triticum, Family : Poaceae, Order : Poales, Class : Monocotyledonae


Question-Determination of age by counting growth rings falls under:

a. Chorology

b. Chronology

c. Dendrology

d. Dendrochronology


Question-In taxonomy the first step is:

a. Identification

b. Nomenclature

c. Classification

d. Affinities




1. The Living World


Characteristics of Living Organisms : Growth, reproduction, metabolism, cellular organization, consciousness (ability to sense environment), self-replicating and self regulation.

• Reproduction and growth are NOT defining properties.

• Metabolism, cellular organization and consciousness are defining properties.

Biodiversity : Term used to refer to the number of varieties of plant and animals on earth.

Nomenclature: standardize the naming of living organism such that a particular organism is known by the name all over the world.

Identification: nomenclature or naming is only possible when the organism is described correctly and we known to what organism the name is attached to.

Need for classification: To organize the vast number of plants and animals into categories that could be named, remembered, studied and understood.

Rules for Nomenclature:

• Latinized names are used, written in italics

• First word represents the genus, second word is species name.

• Printed in italics; if handwritten then underline separately.

• First word starts with capital letter while species name written in small letter.

ICBN: International Code of Botanical Nomenclature (for giving scientific name to plants.)

ICZN: International Code of Zoological Nomenclature (for giving scientific name to animals.)

Taxonomy: Study of principles and procedures of classification.

Binomial Nomenclature: Given by Carolus Linnaeus. Each scientific name has two components - Generic name + Specific epithet.

Systematics: It deals with classification of organisms based on their diversities and relationships among them. Term was proposed by Carolus Linnaeus who wrote ‘Systema Naturae’.

Taxonomic Hierarchy: Arrangement of various steps (categories or taxa Species → Genus → Family → Order → Class → Phylum (for animals) /Division (for plants) Kingdom→

Species: All the members that can interbreed among themselves and can produce fertile offsprings are the members of same species. This is the bio-logical concept of species proposed by Mayer.

Three Domains of Life: Proposed by Carl Woese in 1990 who also proposed the six kingdom classification for living organisms. The three Do-mains are Archaea, Eubacteria and Eukarya.


Herbarium: Storehouse of dried, pressed and preserved plant specimen on sheets.

Botanical Garden: Collection of living plants for reference.

Taxonomical aids: Zoological Park (Places where wild animals are kept in protected environment.)

• Keys (Used for identification of plant and animals on the basis of similarities and dissimilarities.)

• Fauna: (Index to animal species found in a particular area)

• Flora (Index to plant species found in a particular area.)

• Manuals (Provide information for identification of name of species in an area.)

• Monograph (Contain information on one taxon.)

Please refer to the link below for CBSE Class 11 Biology The Living World Notes

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Chapter 02 Biological Classification
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Chapter 05 Morphology of Flowering Plants
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Chapter 06 Anatomy of Flowering Plants
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Chapter 07 Structural Organisation in Animals
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Chapter 08 Cell The Unit of Life
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Chapter 10 Cell Cycle and Cell Division
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Chapter 13 Photosynthesis in Higher Plants
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Chapter 14 Respiration in Plants
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Chapter 15 Plant Growth and Development
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Chapter 16 Digestion and Absorption
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Chapter 17 Breathing and Exchange of Gases
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Chapter 18 Body Fluids and Circulation
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Chapter 19 Excretory Products and their Elimination
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Chapter 20 Locomotion and Movement
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