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6. mutations can be

  • always very good
  • neutral, advantageous, disadvantageous
  • always very dangerous
  • never good or bad

7. what can increase the rate of mutation

  • radiation and some chemicals
  • animals breeding faster
  • temperature and enzymes
  • nothing

8. what is a mutation

  • planned adaption to genetic material that is predictable
  • a random change to genetic material
  • an adaptation that is always favourable
  • variation of genetic material

9. what happens after random mutations take place in each group

  • nothing
  • natural selection selects for different mutations due to different selection pressure in each group
  • a new species is formed
  • the different populations become further separated by an isolating barrier

10. what happens in natural selection

  • selection pressure cause the animals's alleles to change and some die out
  • new organisms are created
  • the best adapted survives, passing on favourable alleles that confer the selective advantage
  • animals fight until someone dies

11. why can alleles lead to animals being better adapted to their surroundings

  • because all animals need new genes
  • because it changes their environment so their better suited
  • because they lead to adaptations, variation in a population allows them to evolve over time
  • because it effects their offspring and allows them to be stronger

12. what is speciation

  • the process in which a new species is formed
  • when species die out
  • the process in which animals adapt over time
  • when species interbreed

13. when does natural selection occur

  • when there are selection pressures
  • when selection pressures die down
  • randomly
  • when an area is overpopulated