How do you find out what animals come from the same animal group? (Like lions and tigers are from the cat family)

Question: How do you find out what animals come from the same animal group? (Like lions and tigers are from the cat family)
- Keywords:
  animals,
  cats,
  group,
  lions,
  tigers
Asked by anon-181170 on 22 Jun 2018.
- Laurent Dupays answered on 22 Jun 2018:
  
  The branch of science concerned with classification (defining and naming groups of biological organisms) is called taxonomy. Animals are grouped on the basis of shared characteristics. For example the position of organs, of the teeth…Lions and tigers are from the cat family because they have a lot in common: carnivorous lifestyle, shape of their muscle…
- Donna MacCallum answered on 22 Jun 2018:
  
  Mostly nowadays we compare DNA sequences to see how alike two species or animals are…there’s lots of renaming of fungi going on just now because DNA has shown that two different looking species are actually different forms of the same thing… a bit like a yorkie and a St Bernard are both dogs, but look very, very different!
- Ashley Akbari answered on 24 Jun 2018:
  
  Great answers from Laurent and Donna

Question: How do you find out what animals come from the same animal group? (Like lions and tigers are from the cat family)