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Biology

Biology
Number of chromosomes in Down's syndrome is

49
48
46
47

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Biology
The layer of cells between endodermis and vascular bundles is called

Hypodermis
Pith
Cortex
Pericycle

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Biology
Alimentary canal runs from mouth to

Anus
Stomach
Small Intestine
Large Intestine

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Biology
Cells which takes part in secondary growth are named as

Xylem
Medullary ray
Cambium
Phloem

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Biology
Muscular wall of the heart is externally covered by

Myocardium
Epithelium
Epicardium
Endothelium

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Biology
Pellagra is caused due to the deficiency of

Thiamine
Riboflavin
Pyridoxine
Niacin

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