Sex produces organisms different from the parent. There is a good chance that some of those offspring will thrive no matter what new conditions occur. Many organisms can reproduce both sexually and asexually. Humans for example can only reproduce sexually.
One is the worldâs most famous teenager, with Â£17million in the bank. The other works part-time in an electronics store for Â£5 an hour, and relies on his mum to give him lifts to school. Meet Miley Cyrusâs half-brother Christopher, 17, above. Although there are just eight months between them and they share the same father, Miley and Christopher are worlds apart.
Niall has an older brother, Greg, who often tweets about missing and feeling separated from Niall. His son, Theo, is Niall's nephew. Niall has eight cousins, some of whom live in Australia. He revealed in October 2015, that he currently lives with one of his cousins, Willie.