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Ecological pyramids are a way of visualizing a food chain, either with the mass of organisms or the total number of the population of organims at each stage...
Active transport is the movement of molecules, usually against the concentration gradient (going from low concentration into a higher concentration), and it requires energy. Diffusion is the movement of m...
Eutrophication describes a process wherein a substance containing excessive levels of nutrients, in this case fertiliser, is applied to land and leaches off into nearby bodies of water (often as a result ...
Bile is used in the digestive system to emulsify fats. This means that it breaks down the fats into smaller fat droplets creating a larger surface area for the digestive enzymes to work on.
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