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

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
A colour blind person cannot see any colours
Colour blind people learn to rely on shapes, patterns, and positions of signs and signals

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Biology
Which one of the following statements regarding haemoglobin is correct?

Haemoglobin present in RBC can carry only oxygen but not carbon dioxide
Haemoglobin of RBC can carry only carbon dioxide
Haemoglobin of RBC can carry both oxygen and carbon dioxide
Haemoglobin is only used for blood clotting and not for carrying gases

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