The Living World: Diversity and Taxonomic Categories

Flashcards covering the fundamentals of biological diversity, nomenclature rules, and the hierarchical taxonomic categories from the introductory chapter of 'The Living World'.

Biodiversity

The number and types of organisms present on earth, currently described as ranging between $1.7-1.8$ million species.

Nomenclature

The process of standardising the naming of living organisms such that a particular organism is known by the same name all over the world.

Identification

The process of correctly describing an organism so that the standardized name attached to it is understood.

ICBN

Acronym for the International Code for Botanical Nomenclature, which provides the agreed principles and criteria for naming plants.

ICZN

Acronym for the International Code of Zoological Nomenclature, evolved by taxonomists for the naming of animals.

Binomial nomenclature

A naming system given by Carolus Linnaeus where each scientific name has two components: the Generic name and the specific epithet.

Generic name

The first word in a biological name representing the genus, which always starts with a capital letter.

Specific epithet

The second component in a biological name representing the species, which always starts with a small letter.

Taxa

The scientific term for the convenient categories used to study organisms, which can indicate groups at different levels (e.g., plants, mammals, or dogs).

Taxonomy

The process of classification of all living organisms into different taxa based on their characteristics.

Modern Taxonomic Studies

Studies based on external and internal structure, cell structure, developmental processes, and ecological information of organisms.

Systematics

A branch of study that accounts for the diversities of organisms and the evolutionary relationships among them, derived from the Latin word 'systema'.

Systema Naturae

The title of the publication by Carolus Linnaeus.

Taxonomic hierarchy

The overall arrangement of all taxonomic categories together, involving a hierarchy of steps where each step represents a rank or category.

Taxon

A unit of classification representing a specific rank or category in the taxonomic arrangement.

Species

The lowest taxonomic category consisting of a group of individual organisms with fundamental similarities.

Genus

A taxonomic category comprising a group of related species which has more characters in common compared to species of other genera.

Family

A category representing a group of related genera characterized on the basis of both vegetative and reproductive features of plants.

Order

A higher taxonomic category that is the assemblage of families which exhibit a few similar characters.

Class

A category that includes related orders, such as Mammalia which includes orders like Primata and Carnivora.

Phylum

In animals, the category higher than class, such as Chordata, based on common features like the presence of a notochord and a dorsal hollow neural system.

Division

The taxonomic category used for plants that is equivalent to the Phylum in animal classification.

Kingdom

The highest taxonomic category in the classification system, such as Kingdom Animalia or Kingdom Plantae.

Hominidae

The family to which humans (Homo sapiens) belong.

Musca domestica

The biological name for the housefly.

Monocotyledonae

The class to which wheat (Triticum aestivum) belongs.