CBSE Class 11 Biology The Living World MCQs Set H

Question: Which one of the following branch is applicable to both plants and animals?
a) Herpetology
b) Saurology
c) Taxonomy
d) Ichthyology
Answer: c

Question: The twin characteristics of growth are:
a) Increase in number of individuals, increase in mass
b) Increase in height and increase in mass
c) Increase in molecular weight and increase in mass
d) Increase in size and decrease in mass
Answer: a

Question: The simplest amino acid is:
a) Aspartic acid
b) Tyrosine
c) Lysine
d) Glycine
Answer: d

Question: Improvement of human race through improvement of human environment is:
a) Anthropology
b) Euthenics
c) Euphenics
d) Eugenics
Answer: b

Question: In binomial nomenclature, the first and second components represent:
a) Genus and species
b) Genus and class
c) Species and genus
d) Kingdom and class
Answer: a

Question: Select the correctly written botanical/ zoological name
a) Panthera tigris
b) Mangifera indica
c) Sativum pisum
d) Homo sapiens
Answer: a

Question: ICBN codes for?
a) International code for Botanical Nomenclature
b) International code for Binomial Nomenclature
c) International code for Botanimal Naming
d) International code for Binomial Naming
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: The statement ‘nothing lives forever, yet life continues’ illustrates the role of
a) Embryogenesis
b) Morphogenesis
c) Replication
d) Reproduction
Answer: d

Question: Which of the following do not reproduces?
a) Phytoplankton
b) Worker bee
c) Queen bee
d) Mycoplasma
Answer: b

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: First book of Botany, Historia Plantarum, was given by:
a) Theoprastus
b) A. P. de Condolle
c) Aristotle
d) None of these
Answer: a

Question: The simplest amino acid is:
a) Aspartic acid
b) Tyrosine
c) Lysine
d) Glycine
Answer: d

Question: The defining feature of life forms?
a) Metabolism
b) Consciousness
c) Cellular organization
d) All of the above
Answer: d

Question: In Mangifera indica Linn., indica refers to
a) Genus
b) Author
c) Family
d) Species
Answer: d

Question: Classification systems have many advantages. Which of the following is not a goal of biological classification?
a) To depict convergent evolution
b) To clarify relationships among organisms
c) To help us remember organisms and their traits
d) To identify and name organisms
Answer: a

Question: Which of the following species are restricted to a given area?
a) Sympatric species
b) Allopatric species
c) Sibling species
d) Endemic species
Answer: d

Question: Linnaeus used the title for his publication is?
a) Systema Naturae
b) Genera Naturae
c) Altis vortex
d) Die Nature lichen pflanzen
Answer: a

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: Read the following statements and identify the correct statements:
A. Biodiversity refers to the number and types of organisms present on earth.
B. The local names would vary from place to place, even within a country.
C. The number of species that are known and described range between 1.7–1.8 million.
D. ICBN provides scientific names for plants.
E. Nomenclature is only possible when the organism is described correctly.
a) A and B only
b) A, B and C only
c) A, D and C only
d) All of these
Answer: d

Question: Incorrect statements are:
A. Animals, mammals, dogs, alsatians represent taxa at different levels.
B. Phenotypic plasticity is the ability of an organism to change its phenotype in response to environment.
C. Nomenclature is only possible when the organism is described correctly.
D. In animals, growth is seen only up to a certain age.
E. Non-living objects also grow if we take increase in body mass as a criteria of growth.
F. Human being is the only organism who is aware of himself.
a) C
b) B
c) A
d) Zero
Answer: d 

Question: Static concept of species was put forward by:
a) de Candolle
b) Linnaeus
c) Mayr
d) Darwin
Answer: b

Question: Sequence of taxonomic categories is:
a) Class-phylum-tribe-order-family-genus-species
b) Division-class-family-tribe-order-genus-species
c) Division-class-order-family-tribe-genus-species
d) Phylum-order-class-tribe-family-genus-species
Answer: c

Question: The term ‘systematics’ refers to:
a) Identification and study of organ systems
b) Identification and preservation of plants and animals
c) Diversity of kinds of organisms and their relationship
d) Study of habitats of organisms and their classification
Answer: c

Question: Which of the following is a defining characteristic of living organisms?
a) Growth
b) Ability to make sound
c) Reproduction
d) Response to external stimuli
Answer: d

Question: First life on earth was:
a) Cyanobacteria
b) Chemoheterotrophs
c) Autotrophs
d) Photoautotrophs
Answer: b

Question: As we go from species to kingdom in a taxonomic hierarchy, the number of common characteristics:
a) Will decrease
b) Will increase
c) Remain same
d) May increase or decrease
Answer: a

Question: A group of plants or animals with similar traits of any rank is:
a) Species
b) Genus
c) Order
d) Taxon
Answer: d

Question: The taxonomic unit ‘Phylum’ in classification of animals is equivalent to which level in plants:
a) Class
b) Order
c) Division
d) Family
Answer: c

Question: The label of a herbarium sheet does not carry information on:
a) Local names
b) Height of the plant
c) Date of collection
d) Name of collector
Answer: b

Question: Which arrangement is in correct ascending order?
a) Species < genus < order < family
b) Genus < species < family < order
c) Order < family < genus < species
d) Species < genus < family < order
Answer: d

Question: Taxonomic key is one of the tools in identification and classification. It is used in preparation of:
a) Monographs
b) Flora
c) Both (a) and (b)
d) None of these
Answer: c

Question: A living organism can be unexceptionally differentiated from a non-living thing on the basis of its ability for:
a) Reproduction
b) Growth and movement
c) Responsiveness to touch
d) Interaction with environment and progressive evolution
Answer: a

Question: Consider the following statements and select correct set of option.
A. The most obvious and technically complicated features are metabolism and consciousness.
B. Growth and reproduction are mutually inclusive events for euglenoids and chrysophytes.
C. Generally, families and orders are identified on basis of aggregates of vegetative characters only.
D. Herbarium serves as quick referral system in taxonomical studies.
a) B, C & D
b) A, C & D
c) B & D
d) A, B, C & D
Answer: c

Assertion & Reason Questions

Directions: These questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.
A. If both Assertion and Reason are True and the Reason is a correct explanation of the Assertion.
B. If both Assertion and Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion and Reason are False. 

Question: Assertion: Character of family is more general as compared to character of genus.
Reason: Genera aggregates closely related species.
Answer: b

Question: Assertion: Chemotaxonomy is classifying organism at molecular level.
Reason: Cytotaxonomy is classifying organism at cellular level.
Answer: b 

Question: Assertion: Living organisms show internal as well as external growth.
Reason: Living organisms undergo the process known as accretion.
Answer: d 

Question: Assertion: In binomial nomenclature, both words are separately underlined.
Reason: Underlining indicates their Latin origin.
Answer: a 

Question: Assertion: The biological species concept helps us to ask how species are formed.
Reason: The concept of biological species focuses our attention on the question of how reproductive isolation comes about.
Answer: d 

Question: Assertion: Hierarchical system of classification is useful to reduce the voluminous description in the catalogue of organisms.
Reason: Characters of a larger category (like division) are not repeated for smaller/lower categories (family and order).
Answer: a