How do scientists classify organisms Based on what evidence

How do scientists classify organisms? Based on what evidence? Birds, bats, and cats all have a common ancestor – how would you draw out these species on a phylogenetic tree based on their evolutionary history?

Solution

the division is usually based on particular characteristics chose by taxonomists, however some time characters that are useful for classifying one group of organism may not be appropropiate for other organisms; So with such reason the larger categories often are not comparable between lineages (ex: an order of birds does not exhibit the same degree of morphological or genetic diversity as an order of bats or cats).

A single line would show three projection and each of projection would indicate birds , cat and bat