Biology
Ginger is a stem and not a root because

It stores food
None of these
It has nodes and internodes
It lacks chlorophyll

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Biology
Ozone hole refers to

decrease in the ozone layer in troposphere
hole in ozone layer
increase in the thickness of ozone layer in troposphere
decrease in thickness of ozone layer in stratosphere

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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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