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Biology

Biology
To complete one heart beat the time taken is

1 minute
1 sec
0.8 second
1.5 sec

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Biology
The numerous minute pores in the epidermis of a leaf are called

Lenticels
Stomata
Perforation
Hydathodes

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Biology
Rh factor is discovered by

Leuen hook
Landsteiner
Landsteiner and Weiner
Weiner

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Biology
Scientist who is known as father of Botany

Theophrastus
Aristotle
Darwin
Linneus

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Biology
It is the site of chromosomes attachment to the fiber of spindle.

Centromere
Blastomere
Centrosme
Chromomere

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Biology
Goitre is due to the deficiency of

Zinc
Iodine
Selenium
Calcium

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