ORGANISMS RESPOND TO CHANGES IN THEIR INTERNAL AND EXTERNAL ENVIRONMENTS
Both plants and animals can respond to their environment. For plants, this involves hormones, which allow them to grow towards or away from certain stimuli. Animals can use either hormones or the nervous system to respond to stimuli. This topic gets interesting and difficult in equal measure when looking at exactly how receptors, the nervous system and effectors work together for this purpose. Usefully, this relates back to a number of earlier topics such as protein structure, cell structure and the movement of substances.
Use the worksheets alongside your textbook and revision guide. The presentations are more for teacher use but students may also find something useful in them.