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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.
The sun provides the initial energetic input for most terrestrial and aquatic ecosystems. Producers (commonly green plants) transform sunlight into food via photo...
All cells undergo cell division in order to replicate themselves, and this process is called the cell cycle. At the end of the cell cyclle, 2 identical daughter cells are formed. Before the major part of ...
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