The Living World Chapter-Wise Test 16

Correct answer Carries: 4.

Wrong Answer Carries: -1.

A plant is placed in a category above class and below kingdom. Which category should be used?

Phylum
Order
Division
Family
3

In plants, classes with a few similar characters are grouped into a division. Division corresponds to phylum in animal classification.

A taxonomist moves from the species rank towards kingdom while classifying an organism. Which combination of changes is expected?

Categories become narrower and common characteristics increase.
Categories become narrower and relationships become easier to determine.
Common characteristics increase and fewer organisms are included.
Categories become broader and common characteristics decrease.
4

As one moves from species towards kingdom, categories become broader and include more organisms, while the number of common characteristics decreases. Relationships at higher ranks are also more difficult to determine.

A student places humans in Hominidae and Chordata. Which pair of categories must occur between these two ranks?

Homo and sapiens
Primata and Mammalia
Carnivora and Mammalia
Mammalia and Animalia
2

Humans belong to the family Hominidae, order Primata, class Mammalia and phylum Chordata. Therefore, Primata and Mammalia occur between Hominidae and Chordata.

A tiger and a lion belong to Panthera, while a domestic cat belongs to Felis. Which conclusion is correct?

The tiger and lion share more characteristics with each other than either shares with the cat.
All three belong to the same genus because they are in Felidae.
The domestic cat belongs to the genus Panthera.
The tiger and lion belong to different families.
1

The tiger and lion belong to the same genus, Panthera, whereas the cat belongs to Felis. Members of the same genus share more characteristics than members placed only in the same family.

A specimen is identified as Mangifera indica. Which additional classification is correct?

Family Poaceae and order Poales
Family Solanaceae and order Polymoniales
Family Muscidae and order Diptera
Family Anacardiaceae and order Sapindales
4

Mangifera indica is mango. It belongs to the family Anacardiaceae and the order Sapindales.

A biologist assigns a scientific name to an organism before establishing which organism the name represents. Which essential step has been omitted?

Classification into kingdom only
Identification through correct description of the organism
Determination of its economic use
Placement in an ecological community
2

Nomenclature is possible only when the organism is correctly described and the organism to which the name is attached is known. This process is identification.

Two animal families, Felidae and Canidae, share a few similar characters. At which rank are they grouped together?

Genus Panthera
Class Mammalia
Order Carnivora
Phylum Chordata
3

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

Early humans grouped certain organisms together because they supplied food, clothing or shelter. Which basis of classification does this illustrate?

Classification based on the uses of organisms
Classification based on evolutionary relationships
Classification based on scientific nomenclature
Classification based on taxonomic hierarchy alone
1

The earliest classifications were based on the usefulness of organisms to humans, especially as sources of food, clothing and shelter.

A student analyses the name Solanum tuberosum. Which interpretation is incorrect?

Solanum is the generic name.
tuberosum is the specific epithet.
The two words together form the biological name of potato.
tuberosum alone is the complete scientific name of the species.
4

A complete binomial name contains both the generic name and the specific epithet. Therefore, tuberosum alone is not the complete biological name; the correct name is Solanum tuberosum.

A researcher identifies organisms, assigns scientific names, classifies them and studies their evolutionary relationships. Which field best describes this work?

Nomenclature alone
Systematics
Classification based only on use
Identification alone
2

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

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