Fossils, Antibiotic-Resistant Bacteria and Classification

• Give two ways a fossil can be formed?


  From Gradual replacement by minerals

  • things like teeth, bones etc don't decay easily so they last along time when buried
  • They’re eventually replaced by minerals as they decay and form a rock-like substance shaped like the original hard part

  From Preservations in places where no decay happens

  • In amber and tar pits there’s no oxygen or moisture so decay microbes can’t survive
• What leads to the formation of antibiotic-resistance strains of bacteria?

  Overuse/misuse of antibiotics.

  Mutated Cell is copied during mitosis process and then continued to develop
• Name the groups that organisms are classified into in the Linnaean system?

  Kingdom, Phylum, Class, Order, Family, Genus, Species
• Who proposed the ‘three-domain system’ of classification in 1990?

  Carl Woese