This protects their body a bit like a suit of armour. Vertebrates have a backbone inside their body. They include mammals, birds, fish, amphibians and reptiles.
The BBC Bitesize guide to kinetic theory contains infographics and text to explain concepts such as the changing states of matter, plus more physics revision notes written to the WJEC GCSE physics ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback