CBSE Class 11 Biology The Living World Notes

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

Answer-d

Question-The word systematics is derived from

a. Greek word systema

b. Italic word systema

c. Latin word systema

d. English word systema

Answer-c

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

a Genera

b. Family

c. Class

d. Species

Answer-c

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

a. Anthropology

b. Euthenics

c. Euphenics

d. Eugenics

Answer-b

Question- Taxon represents:

a. Rank in classification

b. Basic unit of classification

c. Both of these

d. None of these

Answer-a

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

Answer-a

Question-Thesuffix – inae signifies the rank:

a. Tribe

b. Subtribe

c. Suborder

d. Family

Answer-b

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

a. Law

b. Principle

c. Theory

d. Hypothesis

Answer-d

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

Answer-c

Question-Species living in different geographical areas are called:

a. Allochronic

b. Allopatric

c. Sympatric

d. Siblings

Answer-b

Question-In Mangifera indica Linn. indica refers to

a. Genus

b. Author

c. Family

d. Species

Answer-d

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

Answer-a

Question-Edaphology is:

a. Study of soils

b. Study of amphibians

c. Study of snakes

d. Study of elephants

Answer-a

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

Answer-c

Question-Systematics takes accounts:

a. Evolutionary relationship between organisms.

b. Breeding relationship between organisms.

c. Economic relationship between organisms.

d. None of these

Answer-a

Question-Term biology was introduced by:

a. Aristotle

b. Darwin

c. John Ray

d. Lamarck and Treviranus

Answer-d

Question- Term classification was given by:

a. A.P de Condolle

b. Norman E. Borloug

c. Tansley

d. None of these

Answer-a

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

Answer-d

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

a. Chorology

b. Chronology

c. Dendrology

d. Dendrochronology

Answer-d

Question-In taxonomy the first step is:

a. Identification

b. Nomenclature

c. Classification

d. Affinities

Answer-a

1. The Living World

POINTS TO REMEMBER:

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