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Many mitochondria which release lots of energy allowing it to swim.Flagellum (tail) which allows it to swim to the egg.Enzymes in the head which allow it to digest the egg cell membrane.

Osmosis is the diffusion of water molecules from a low solute concentration to a high solute concentration across a partially permeable membrane.

Osmosis is the diffusion of water molecules from an area of high water potential to low water potential, across a selectively/ permeable membrane. + diagram on whiteboard

The impulse arrives at the synapse. The neurone releases neurotransmitters into the synapse. The neurotransmitter diffuses across the synapse and binds to a receptor on the next neurone. This causes the next...

= size of image/ real size of object Can use the magnification triangle to work this out. Can also use the triangle to calculate each image size or object size, if you already have the scale of magnification...