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Diffusion may be simple, whereby solutes travel through the phospholipids in the cell membrane as they have the same polarity as a lipid or are small enough to do so.Or, diffusion is faciliated and this i...

A tropism is a growth in a plant in response to a stimulus. The stimulus could be a change in the direction of light or a water source. To recap, a stimulus is a change in the environment of an organism t...

The blood in the capillary has just returned to the lungs from the rest of the body, so contains a low concentration of oxygen. The alveolus contains air that has just been breathed in by ventilation, so ...

Area of square : Base x Height.

Area of Circle: π x (Radius)².

Looking at the diagram we are given the dimensions of the base or he...

Using the UK as a case study, voluntary migration has benefits and costs to the host nantion. Voulntary migration can help balance demographic changes to sustain a healthy working age population. In doing...