Biology
The main function of the inner bark of a woody plant is to

Transport minerals and water from the roots to the leaves
Protect the plant from herbivorous animals
Transport food from the leaves to the other parts of the plant
Act as a membrane impermeable to water and gas

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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
A colour blind person cannot see any colours
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

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