The Living World Chapter-Wise Test 9

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following forms the basis of modern taxonomic studies?

Only the economic uses of organisms
Only the external appearance of organisms
Only the habitats occupied by 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 of the following statements correctly describes systematics?

It is limited only to classification.
It deals only with assigning scientific names.
It includes identification, nomenclature and classification and considers evolutionary relationships.
It excludes the study of relationships among organisms.
3

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

Which of the following statements about binomial nomenclature is incorrect?

A biological name has two components.
The generic name always begins with a small letter.
Biological names are written in italics when printed.
The system was given by Carolus Linnaeus.
2

The generic name begins with a capital letter, whereas the specific epithet begins with a small letter. Both words are written in italics when printed.

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

Grouping organisms only according to their uses
Assigning different local names to the same organism
Placing every organism directly in a kingdom
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 of the following correctly describes classification?

It groups organisms into convenient categories based on observable characters.
It has no role in the study of biological diversity.
It is based only on the economic importance of organisms.
It applies only to animals.
1

Classification is the process of grouping organisms into convenient categories based on easily observable characters, making their study manageable.

Which statement about the language of biological names is correct?

Biological names must be written in the local language.
Only plant names are written in Latin.
Biological names are generally in Latin or are Latinised, irrespective of their origin.
The generic name and specific epithet must come from different languages.
3

Biological names are generally in Latin or are Latinised irrespective of their origin. When printed, they are written in italics.

Which category is used in plant classification in place of phylum?

Order
Class
Division
Family
3

In plants, classes with a few similar characters are assigned to the higher category called division. The corresponding category in animals is phylum.

On what basis were the earliest classifications of organisms made?

Their positions in the taxonomic hierarchy
Their usefulness to human beings
Their scientific names
Their evolutionary relationships
2

The earliest classifications were based on the uses of organisms because human beings needed sources of food, clothing and shelter.

What does “Linn.” indicate in the biological name Mangifera indica Linn.?

The plant belongs to the family Linnaceae.
The plant was first found in India.
The generic name has been abbreviated.
The species was first described by Linnaeus.
4

The abbreviated author name written after the specific epithet indicates the scientist who first described the species. “Linn.” indicates Linnaeus.

What does the term “taxon” represent in biological classification?

A unit of classification representing a rank or category
Only the species category
A rule used for writing scientific names
A group based only on the uses of organisms
1

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

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