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What is the difference between osmosis and diffusion?

These two processes can often be confused very easily. To begin with both processes are based on the principle of molecules moving from an area of high concentration to an area of lower concentration. With d...
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Answered by Nathan T. Biology tutor
8408 Views

How does muscle contraction work?

So the muscle is made up of 2 muscle filaments, a thick filament called myosin and a thin one actin. This can be remembered by actin having 2 syllables which is less than myosin which has 3 so actin is thinn...
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Answered by Sonam T. Biology tutor
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Describe and explain the Nitrogen Cycle.

For a question like this it is very useful to draw a diagram of the cycle linking to where it occurs to aid visual learning and retention of each stage. For example, I like to teach this by showing the cycle...
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Answered by Lucy W. Biology tutor
16026 Views

What is the purpose and structure of a cell membrane?

The purpose of the cell membrane is to make the cell into a closed compartment that is separate from the extracellular (outside) environment. It also works as a selective barrier that can allow the import or...
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Answered by Olivia L. Biology tutor
3776 Views

What is the difference between passive and active immunity?

Active immunity involves your bodies direct response to an unknown pathogen. This response is the production of antibodies specific to the antigen of a particular pathogen. This type of immunity is not immed...
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Answered by Emily P. Biology tutor
227956 Views