This is called photosynthesis. In turn ... and also explains the position of humans in the food chain. This short film is an ideal tool to help pupils to explore what a food chain is and how ...

Most food chains start with a green plant, because plants can make their food by photosynthesis. This food chain shows a leaf is eaten by a worm, which is then eaten by a bird. The arrow means 'is ...

Cells get nutrients from their environment, but where do those nutrients come from? Virtually all organic material on Earth has been produced by cells that convert energy from the Sun into energy ...

Photosynthesis ... are as close to human food as plants get. Plants can then burn carbohydrates for energy via cellular ...