The Living World Chapter-Wise Test 13

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which combination of information forms the basis of modern taxonomic studies?

Only the external appearance of organisms
Only the economic uses and local names of organisms
Only the habitat and geographical distribution of organisms
External and internal structure, cell structure, development and ecological information
4

Modern taxonomic studies use external and internal structure, cell structure, developmental processes and ecological information.

Which statement correctly explains the term “taxon”?

It refers only to the species category.
It is a rule for writing biological names.
It is a unit of classification representing a rank or category.
It refers only to groups of animals.
3

A taxon is a unit of classification representing a rank or category. Species, genus, family and class are taxa at different hierarchical levels.

What is meant by identification in the study of living organisms?

Grouping organisms only according to their uses
Assigning several local names to the same organism
Placing an organism in a kingdom without describing it
Determining the organism to which a particular name is attached
4

Identification involves correctly describing an organism and determining the organism to which a particular name is attached.

Which statement about species is correct?

A species is an assemblage of related genera.
A species is a group of individual organisms with fundamental similarities.
Every species belongs to several different genera.
Closely related species cannot be distinguished morphologically.
2

A species is a group of individual organisms with fundamental similarities. Closely related species can be distinguished from one another by distinct morphological differences.

Felidae and Canidae share a few similar characters and are placed together in which category?

Carnivora
Mammalia
Chordata
Panthera
1

Felidae and Canidae are related families placed in the order Carnivora. An order is an assemblage of families sharing a few similar characters.

Which statement correctly describes the scope of systematics?

It deals only with assigning names to organisms.
It excludes identification and classification.
It includes identification, nomenclature and classification and considers evolutionary relationships.
It groups organisms only according to their economic uses.
3

Systematics includes identification, nomenclature and classification. It also takes evolutionary relationships among organisms into account.

Which statement correctly describes the relationship between phylum and class in animal classification?

A phylum contains related classes.
A class contains several related phyla.
Phylum is placed below class.
Class and phylum represent the same rank.
1

Related classes are grouped into a phylum in animal classification. For example, classes containing fishes, amphibians, reptiles, birds and mammals are included in Chordata.

A human is classified under the genus Homo and the order Primata. Which category lies between these two ranks?

Mammalia
Hominidae
Chordata
sapiens
2

Humans belong to the genus Homo, family Hominidae and order Primata. Therefore, Hominidae lies between the genus and order.

Solanum tuberosum, Solanum melongena and Solanum nigrum illustrate which taxonomic principle?

A family contains only one species.
A specific epithet can be used without a generic name.
All organisms in a genus have the same specific epithet.
A genus may include several related species.
4

The genus Solanum includes several related species with different specific epithets, such as tuberosum, melongena and nigrum.

Which international code provides agreed principles and criteria for the scientific naming of plants?

International Code of Zoological Nomenclature (ICZN)
International Code for Botanical Nomenclature (ICBN)
International Union for Conservation of Nature (IUCN)
World Health Organization (WHO)
2

The International Code for Botanical Nomenclature provides agreed principles and criteria for assigning scientific names to plants.

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