biology

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classification

monera-unicellular,no nucleus,includes bacteria

protoctista-unicellular,does have a nucleus

fungi-multicellular,have a cell wall,no chloroplasts,feeds off organic matter(saprophyte)

plantae-multicellular,have a cell wall, no chloroplasts, makes their own food by photosynthesis(autotrophs)

animalia-multicellular,no cellulose cell wall or chloroplasts,food is obtined from the environment and digested(heterotrophs)

kingdom,phylum,class,order,family,genus,species

  • the vertebrates are a subgroup of the phylum chordata
  • a phylum is a group that shares important characteristics
  • we do not classify viruses as they are not concidered living
  • not all living things fit neatly into groups
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genetic variation

gene-a section of DNA on a chromosome

gamete-(sex cell) 1/2 egg 1/2 sperm

mutation-changes in genes (DNA)

continuous variation-when variation is spread over a range of values e.g. weight,height

discontinuous variation-variations that have no intermidiates, people can be put into distinct groups e.g. scars, blood type

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