Biology
Which of the following is true of osmosis?

Requires energy
It is a type of diffusion
Movement is against water's concentration gradient
All of these

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Biology
Which of the following is not true of colour blindness?

A colour blind person cannot see any colours
Colour blind people learn to rely on shapes, patterns, and positions of signs and signals
Red-green colour blindness is the most common type of colour blindness
For some people, it might be difficult to recognize colours of traffic lights and signs

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