Biology
Appetite is triggered by

Pancreatic enzymes
Stomach enzymes
Physiological drive
Environmental cues such as the smell or taste of food

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

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

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