speciation, resistant bacteria and classification

• Speciation is the development of a new species
• A species is a group of similar organisms that reproduce fertile offspring
• Speciation occurs when populations of the same species become so different that they no longer successfully interbreed and produce fertile offspring
• Isolation and natural selection lead to speciation
• Isolation is where populations of species are seperated
• Isolation can be a result of a physical barrier (e.g floods and earthquakes geographically isolate them)
• Different environments cause different characteristics
• In isolation, each side will develop different characteristics due to natural selection
• Each population in speciation shows genetic variation because they have a wide range of alleles
• In speciation, eventually individuals from each side will have changed so much from natural selection they won't be able to breed to produce fertile offspring
• Bacteria can evolve and become antibiotic resistant
• antibiotic resistance is due to random mutations
• antibiotic resistance spreads quickly as bacteria reproduce rapidly and evolve quickly
• MRSA is a superbug that can be fatal if enters the bloodstream and is hard to get rid of cheeky
• antibiotic resistance is becoming more common
• overusing antibiotics can lead to antibiotic resistance
• Why should you take all of the pills a doc prescribes?

  you should take the full course so that all bacteria is destroyed, and so that none are left to develop into antibiotic resistant strains
• recite the linnaean system

  kingdom

  phylum

  class

  order

  family

  genus

  species
• Name the three domains

  archaea - primitive bacteria

  bacteria - true bacteria

  eukaryota - broad range of organisms including fungi, plants, animals and protists
• in the binomial system, every organism has it's two part latin name
• the first part of the binomial name refers to the genus and the second part refers to the species
• The more recent a common ancestor, the more closely related you are to them, and the more characteristics they are likely to share
• evolutionary trees show evolutionary relationships