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Biology

Biology
Which group of animals was the first to evolve to fly

Birds
Insects
Mammals
Reptiles

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Biology
Which chemical is not found in DNA nucleotides?

All of these
Thymine
Adenine
Uracil

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Biology
Other than spreading malaria, anopheles mosquitoes are also vectors of

encephalitis
yellow fever
dengue fever
filariasis

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Biology
Main nitrogenous product formed in man

Ammonium nitrate
Ammonia
Uric acid
Urea

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Biology
Which one of the following is a rich source of iron?

Spinach
Pea
Carrot
Rice

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Biology
Which part of human eye controls the amount of light entering the eye

Iris
Pupil
Cornea
Retina

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