The Living World Chapter-Wise Test 15

Correct answer Carries: 4.

Wrong Answer Carries: -1.

An organism is considered successively at the species, genus, family and kingdom levels. Which change is expected as one moves towards kingdom?

The categories become more specific.
The number of shared characteristics increases.
The difficulty of determining relationships decreases.
The number of shared characteristics decreases.
4

As one moves from species towards kingdom, the categories become broader and the number of common characteristics decreases. Determining relationships among taxa at higher levels also becomes more difficult.

Which of the following statements about the taxonomic hierarchy is incorrect?

Species is the lowest taxonomic category.
A family contains related genera.
Order is ranked above class.
Kingdom is the highest category described in the hierarchy.
3

Order is placed below class and above family. The ascending sequence is species, genus, family, order, class, phylum or division, and kingdom.

Which combination of taxonomic categories correctly represents the housefly?

Genus: Musca; Family: Felidae; Order: Carnivora
Genus: Musca; Family: Muscidae; Order: Diptera
Genus: Homo; Family: Hominidae; Order: Primata
Genus: Triticum; Family: Poaceae; Order: Poales
2

The housefly is Musca domestica. It belongs to the genus Musca, family Muscidae and order Diptera.

Which statement correctly describes a species?

It is a group of individual organisms with fundamental similarities.
It is an assemblage of several related genera.
It is a group of organisms occupying the same habitat.
It is the highest category in the taxonomic hierarchy.
1

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

Panthera leo, Panthera pardus and Panthera tigris illustrate which taxonomic principle?

A species may contain several unrelated genera.
A family always contains only one genus.
All organisms in a genus have the same specific epithet.
A genus may contain several closely related species.
4

The genus Panthera includes closely related species such as lion, leopard and tiger, represented by the specific epithets leo, pardus and tigris.

Which combination of features is mentioned for animals placed in phylum Chordata?

Three pairs of jointed legs and an external skeleton
A notochord and a dorsal hollow neural system
External ears and body hair only
Vegetative and reproductive plant features
2

Animals such as fishes, amphibians, reptiles, birds and mammals are placed in Chordata based on common features such as a notochord and a dorsal hollow neural system.

On what basis were the earliest classifications of organisms made?

Their usefulness to human beings
Their positions in the taxonomic hierarchy
Their scientific names
Their evolutionary relationships
1

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

Which of the following statements about binomial nomenclature is incorrect?

A biological name has two components.
The specific epithet is written before the generic name.
Biological names are generally in Latin or are Latinised.
The system was given by Carolus Linnaeus.
2

The generic name is written first and is followed by the specific epithet. For example, in Mangifera indica, Mangifera is the generic name and indica is the specific epithet.

Which of the following statements about systematics is incorrect?

Its scope includes identification, nomenclature and classification.
It takes evolutionary relationships among organisms into account.
It is restricted only to naming and classifying organisms.
The word systematics is derived from the Latin word systema.
3

Systematics is not restricted to naming and classification. It includes identification, nomenclature and classification and also considers evolutionary relationships among organisms.

Which combination forms the basis of modern taxonomic studies?

Only local names and economic uses
Only external appearance and colour
Only habitat and geographical distribution
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.

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