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Biology

Biology
To complete one heart beat the time taken is

1 minute
0.8 second
1.5 sec
1 sec

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Biology
Which of the following does not have blood but undergoes respiration ?

Hydra
Snail
Kangaroo
Cockroach

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Biology
At which stage in its life cycle does the silkworm yield the fiber of commercial use

Imago
Pupa
Larva
Egg

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Biology
The innermost part of a flower is known as

Petals
Pistils
Sepals
Stamens

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Biology
Important component that helps in clotting of the blood is called ________ .

Platelets
Plasma
Serum
Haemoglobin

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Biology
In a healthy person rate of heart beat on one minute is

72 times
58 times
90 times
67 times

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