Biology
Out of 900 reported species of living gymnosperms, conifers are represented by about 500 species, About 2,50,000 species of angiosperms (flowering plants) have also been reported in the world. The vast and dominant woodlands in Europe, Asia, North America and mountains such as Himalayas are wooded with

all gymnosperms, except conifers
angiosperms and all gymnosperms except conifers
only angiosperms
only conifers

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

A colour blind person cannot see any colours
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

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Biology
Which one among the following statements is correct ?

All arteries carry oxygenated blood
All veins carry oxygenated blood
Except the pulmonary artery, all other arteries carry oxygenated blood
Except the pulmonary vein, all other veins carry oxygenated blood

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