Biology
In many which phylum the body of an organisms is usually divided in there regions called head, thorax and abdomen?

Annelida
Arthropods
Echinodermata
Chordata

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

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

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