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Biology

Biology
The disease Rickets is caused by the deficiency of

Vitamin B
Vitamin A
Vitamin C
Vitamin D

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Biology
Oxygen crosses a plasma membrane by

Concatenation
Osmosis
Evaporation
Diffusion

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Biology
Amoeba proteus was discovered by

William Bullock
Gerald Durrell
Johann Rösel von Rosenhof
Paul Émile de Puydt

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Biology
Enzyme secreted by stomach digests the food but stomach is not digested by this digestive juice because

This is made up of hard cells
It is made up of steel
None of these
Wall of stomach is lined with mucus

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Biology
Which of the following acts as an insulator against heat, cold and as a shock-absorber in the body ?

Epidermis
None of these
Subcutaneous fat layer
Dermis

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Biology
They are considered to be the most primitive and are surely the first of the vertebrates

Frogs
Reptiles
Jawless fishes
Amphibinas

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