Moving isn't just for animals. Plants do it too. This lily opens its petals in the daytime and closes them again at night., Everything you do requires energy. Your energy comes from food but your body has to break down the food to release energy. This is called respiration., A deer runs when it hears a loud noise. Organisms are always on the look out for threats, food or mates. Sensing what is going on around you, then taking action, is called sensitivity., Animals start their lives small and then grow until they're adults. Plants can keep growing all their lives., Humans usually have just one baby at a time, while insects can lay thousands of eggs in one go. All organisms need to replace themselves, or reproduce, otherwise there would soon be none left., Excreting means getting rid of waste. Organisms produce unwanted products when they break down food. Many animals excrete carbon dioxide in their breath and other waste in urine., Nutrition means taking in food and using it for other life processes. Carbohydrate, fat and protein are nutrients for humans. Plants can make their own nutrients.,

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