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An efficient exchange surface should have a high surface area as this increases the rate at which diffusion can occur across it. For instance, roots have many root hair cells. These root hair cells have t...

Synapses are a gap or a junction between two neurones. When a nerve impulse is travelling along the axon of the first neurone and the impulse reaches the axon terminal (the end of the axon), a chemical ca...

Firstly, you should identify the point of view of the speaker - are they first person, second person or third person? Is the narrator a character within the sto...

Diffusion is the movement of particles (gases and liquids) from an area of high concentration to an area of low concentration. No energy is required (it is a passive process).Osmosis is the movement of wa...

You need to use Pythagoras's theorem which states that for any right angled triangle, a²+b²=c² , where c is the hypotenuse and a and b are the other 2 sides of the triangl...