Biology Classification Crossword Review

Classification Terms and Definitions

Genus: First part of the binomial nomenclature, representing a group of closely related species.
Taxonomy: The scientific discipline that classifies organisms and assigns them universally accepted names.
Eukarya: Also known as Eukaryota, this domain encompasses all organisms with nucleated cells, including protists, plants, fungi, and animals.

Hierarchical Classification

Class: A taxonomic rank that encompasses groups of similar orders.
Family: Comprises genera that share various characteristics.
Phylum: A group of closely related classes, representing a broad category within the hierarchical system.
Order: Organizes similar families into larger groupings.
Kingdom: Collectively groups closely related phyla, representing a major category in classification.

Biological Kingdoms

Fungi: A kingdom comprised of heterotrophic organisms, primarily decomposers that obtain energy from dead organic matter.
Plantae: This kingdom includes multicellular photosynthetic autotrophs with cell walls made of cellulose.
Eubacteria: A kingdom of unicellular prokaryotic organisms characterized by cells containing peptidoglycan.
Archaebacteria: Recognized for unicellular prokaryotes with cell walls lacking peptidoglycan, classified under the kingdom Archaea.
Animalia: Consists of multicellular eukaryotic heterotrophs that do not have cell walls, differentiating them from plants and fungi.

Taxonomic Structure

Domain: The broadest taxonomic category, surpassing kingdoms in inclusivity.
Taxon: Refers to any group or level of organization in which organisms are classified, relevant across the taxonomic hierarchy.

Classification Methodology

Binomial Nomenclature: A two-part naming system for species, essential for uniform scientific communication.

Notable Characteristics

Eukaryotes: All members of the domain Eukarya; noted for cellular complexity and the presence of membrane-bound nuclei.
Prokaryotes: Divided into two kingdoms: Eubacteria (with peptidoglycan) and Archaebacteria (without peptidoglycan).

These foundational terms and structures are critical for understanding biological classification and the relationships among various living organisms.