Classifications

• The classification system is based on the Linnaean System, which was developed by Carl Linnaeus.
• The classification system is based on the Linnaean hierarchy.
• Kingdom - The highest level of taxonomic grouping that includes all life forms.
• Classification helps us understand relationships between living things.
• Genus refers to the group or category that an organism belongs to, while species refers to the specific type within that group.
• Linnaeus created a hierarchical system to classify organisms, starting with kingdom and ending with species.
• Phylum (Division) - A major category within a kingdom that contains related classes or subphyla.
• Order - A group of closely related families sharing common features.
• Class - A group of organisms with similar characteristics at the phylogenetic level.
• Taxonomy is the science of naming and classifying organisms.
• Species are groups of similar individuals that can interbreed and produce fertile offspring.
• Invertebrates are animals without spines, while vertebrates have a spine. Invertebrates are sometimes (mistakenly) thought of as primitive because of their lack of developed organs.
• The classification system used by biologists includes Kingdom, Phylum/Division, Class, Order, Family, Genus, Species.
• Kingdom Animalia consists of all multicellular eukaryotes that obtain food through ingestion.
• Animal cells contain membrane-bound organelles such as mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, ribosomes, cytoskeleton, nucleus, and cytoplasm.
• Kingdom refers to the largest category of living things, such as plants or animals.
• Phylum/division is a subcategory within kingdom, representing major evolutionary lineages.
• Class represents a more specific division within phylum/division, containing several orders.
• Subphylum Vertebrata has a backbone made up of vertebrae.
• Class Mammalia has hair, mammary glands, three middle ear bones, and a four-chambered heart.
• Class is a grouping of related orders within a phylum.
• Phylum is a grouping of related classes within a kingdom.
• Genus is a grouping of closely related species.
• Family classifies related species into distinct categories, such as felidae (cats).
• Vertebrates are divided into five classes based on their body structure and mode of reproduction.
• Kingdom is the highest level of classification used to categorize organisms based on their evolutionary relationships.
• The classification system provides great deal of information about the characteristics of organisms. Using scientific names can therefore act as a shorthand method for describing a plant or animal.