The Living World: Diversity and Taxonomic Categories

Vocabulary practice flashcards covering biodiversity, binomial nomenclature, taxonomy, and the taxonomic hierarchy based on Chapter 1: The Living World.

Biology

The science of life forms and living processes.

Ernst Mayr

Harvard University evolutionary biologist (1904–2004) hailed as 'The Darwin of the 20th century' who pioneered the currently accepted definition of a biological species.

Triple Crown of Biology

The three prestigious prizes awarded to Ernst Mayr: the Balzan Prize (1983), the International Prize for Biology (1994), and the Crafoord Prize (1999).

Biodiversity

The number and types of organisms present on Earth, currently estimated at 1.7 to 1.8 million known and described species.

Nomenclature

The standardized system of naming 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 to determine exactly what known name attaches to it.

ICBN

International Code for Botanical Nomenclature; the organization providing agreed principles and criteria for naming plants.

ICZN

International Code of Zoological Nomenclature; the organization providing agreed principles and criteria for naming animals.

Binomial Nomenclature

A naming system developed by Carolus Linnaeus in which each scientific name consists of two components: the generic name and the specific epithet.

Author Citation

The writing of the author's name in abbreviated form after the specific epithet (e.g., Mangifera indica Linn.) to indicate who first described the species.

Classification

The process by which anything is grouped into convenient categories based on easily observable characters.

Taxa

The scientific term for categories used in classification that can represent ranks at different hierarchical levels (e.g., Animals, Mammals, Dogs).

Taxonomy

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

Four Basic Processes of Taxonomy

Characterisation, identification, classification, and nomenclature.

Basis of Modern Taxonomic Studies

External and internal structure, cell structure, developmental processes, and ecological information of organisms.

Systematics

The branch of study derived from the Latin word 'systema' that addresses the diverse kinds of organisms, their relationships, and their evolutionary histories.

Systema Naturae

The title of the landmark publication written by Carolus Linnaeus.

Taxonomic Category

A single step or rank within the overall taxonomic arrangement, representing a unit of classification.

Taxonomic Hierarchy

The complete framework composed of all taxonomic categories arranged in ascending or descending sequence.

Species

The lowest taxonomic category, consisting of a group of individual organisms with fundamental similarities distinguishable by distinct morphological differences.

Genus

A taxonomic category comprising an aggregate of closely related species that share more characters in common relative to species of other genera.

Family

A taxonomic category comprising related genera characterized on the basis of both vegetative and reproductive features in plants (e.g., Solanaceae, Felidae).

Order

A higher taxonomic category that aggregates families sharing a few similar characters based on floral or general characteristics (e.g., Polymoniales, Carnivora).

Class

A taxonomic category comprising related orders (e.g., Mammalia, which includes orders Primata and Carnivora).

Phylum / Division

A taxonomic category comprising related classes; referred to as Phylum in animals (e.g., Chordata) and Division in plants.

Kingdom

The highest broad category in the system of classification (e.g., Kingdom Animalia and Kingdom Plantae).

Taxonomic Placement of Man

Biological Name: Homo sapiens; Genus: Homo; Family: Hominidae; Order: Primata; Class: Mammalia; Phylum: Chordata.

Taxonomic Placement of Housefly

Biological Name: Musca domestica; Genus: Musca; Family: Muscidae; Order: Diptera; Class: Insecta; Phylum: Arthropoda.

Taxonomic Placement of Mango

Biological Name: Mangifera indica; Genus: Mangifera; Family: Anacardiaceae; Order: Sapindales; Class: Dicotyledonae; Division: Angiospermae.

Taxonomic Placement of Wheat

Biological Name: Triticum aestivum; Genus: Triticum; Family: Poaceae; Order: Poales; Class: Monocotyledonae; Division: Angiospermae.