Classification

• to sort something is to look at its similarities
• to classify something is to look at common properties and then classify them into common groups.
• There are five kingdoms in living things - plants, animals, fungi, protists and bacteria/monera
• When naming species, biologists use a binomial system of classification, which is a two word name.
• a dichotomous key is a list of two or more categories, each with a single characteristic.
• a circular key is a key that is used to access a database table by its primary key.
• The classification of kingdoms is based on the cell type and how they obtain their food.
• Monera have chloroplast, are microscopic, and have no membrane. They reproduce by dividing into two.
• Protists are microscopic unicellular organisms. They live in damp places and reproduce by fission.
• Fungi are uni or multicellular, have no chloroplasts, has a cell wall and a nucleus.
• Plants are multicellular, have chloroplasts in leaves, has a cell wall, and has a nucleus.
• Animals are multicellular, have no chloroplasts, no cell wall, but has a nucleus.
• The animal kingdom is classified into groups called phyla/phylum.
• Animals with no backbone are called invertebrates.
• Animals that posses backbones are called vertebrates/chordates.
• An example of a monotreme is a platypus or echidna.
• An example of a marsupial is a kangaroo.
• An example of a placental is an elephant.
• Arthropods are a group of invertebrates that have jointed limbs and a segmented body.
• Groups within arthropods include the insects, arachnids, crustaceans, millipedes, and centipedes.
• A cnidarians have stinging cells and a bag like body with only one opening surrounded by tentacles.
• Arthropods have segmented bodies, paired jointed legs, and an exoskeleton.
• Molluscs have soft bodies, and are sometimes covered with a shell.
• Groups within worms include the flatworms and the segmented worms.
• Groups within fish include the bony ones, cartilaginous ones, and the jawless ones.