Answer: 1) vestigial structures 2) Analogues structures 3) DNA sequence data 4) Homologues structures
Explanation: vestigial structures also called vestigial organs, lost their function in some organisms whereas playing a important role in others.
Analogue structures have different structures but same function.
DNA sequencing is a method which is used to check similarities among different group of organisms.
Homologues structures have same structure with different functions.