Biology
The brain is a part of which organ system

Respiratory System
Circulatory System
Nervous System
None of these

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

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

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