Classification lo and_qu
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Classification lo and_qu






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    Classification lo and_qu Classification lo and_qu Document Transcript

    • Classification and diversity of living organisms – 4th Year Summer Exam Concept and use of a classificatory system  define and describe the binomial system of naming species and classify the five main classes of vertebrates using visible, external characteristic features only Classification makes the ____________________________ of living organisms easier. It involves the sorting of organisms into _______________ according the to ______________ they have in common. The biggest group is the __________________. There are 5 kingdoms  ________________________ - Very small and single-celled, with cell walls but not nucleus (they do have simple DNA)  ________________________ - Single celled with a nucleus  ________________________ - Cell walls contain chitin, with a nucleus  ________________________ - Multicellular organisms, can make food through photosynthesis  ________________________ - Multicellular, have to obtain food Each Kingdom is divided into smaller groups  P___________________________  C___________________________  O___________________________  F___________________________  G___________________________  S___________________________ Binomial System The system of classifying organisms uses two names - __________________ and ____________ which are written in _____________________. The genus name always has a ____________________ letter  e.g. Panthera leo lion Adaptations of organisms to their environment, to be illustrated by examples wherever possible  list the main features used in the classification of the following groups: flowering plants (monocotyledons and dicotyledons), arthropods (insects, crustaceans, arachnids and myriapods), annelids, nematodes and molluscs, using visible, external characteristic features only  list the main features used in the classification of the following groups: viruses, bacteria and fungi, and their adaptation to the environment, as appropriate
    • Classification of vertebrates  vertebrates are animals with a _____________________________  vertebrates are divided into 5 classes Vertebrate class visible external Features Fish Amphibians Reptiles Birds Mammals Classification of Arthropods  They are ___________________________ - They have no backbone  They have and _______________________ which is waterproof  Their bodies are _____________________  They have _________________ limbs Class Example External features Insects Arachnids Crustaceans Myriapods Classification of other groups of invertebrates Class Example Annelids nematodes Molluscs External features
    • Classification of viruses, bacteria and fungi Viruses, e.g. HIV  Very small  NOT ____________________  Contain a strand of DNA or RNA  Surrounded by a ________________ _________________ (capsid)  Only life process they show is ____________________ (inside host cells) Bacteria e.g. E. coli  Small  Cell wall, cell membrane and cytoplasm  No ___________________, DNA is a single coil  Some have a slime capsule  Some have ______________ (for movement) Fungi e.g. Mucor  Multicellular fungi are composed of ____________________  Cell walls made of cellulose or chitin  Do not ___________________________  Some produce spores Classification of flowering plants Key features  Multicellular organisms  ___________________ cell walls and sap vacuoles  Roots, stems and leaves  Some cells contain _____________________  Two groups o o  Monocotyledons Dicotyledons The term ____________________ means “seed leaf” FEATURE MONOCOTYLEDON DICOTYLEDON In threes In fives Leaf Shape Leaf veins Cotyledons (seed leaf) Grouping of flower parts