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.
Cyrus' daughter Miley (born the same year Achy Breaky Heart was a hit) was cast in the title role of the Disney situation comedy Hannah Montana as an ordinary teenager who moonlights as a pop star, and Billy Ray, reasonably enough, co-starred as her father and manager, Robbie Stewart.