Top answers

Biology
GCSE

How is a sperm cell adapted to its role?

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.

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Answered by Fay H. Biology tutor
2134 Views

What is osmosis?

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

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Answered by Fay H. Biology tutor
1713 Views

What is osmosis?

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

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Answered by Anna K. Biology tutor
1689 Views

Describe how an impulse travels across a synapse

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 n...

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Answered by Fay H. Biology tutor
2080 Views

How do you calculate the magnification of an image? For example, if the real size of a cell is 30um and the size of the cell in the textbook is 60mm, what is the magnification?

= 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 magnificat...

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Answered by Harriet F. Biology tutor
9814 Views

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