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Biology

Biology
Sickle-cell anaemia is due to

Hormones
Genes
Viruses
Bacteria

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Biology
Which one of the following is the correct sequence in the order of decreasing length of the structural parts given below of small intestine in the human body?

Ileum-Jejunum-Duodenum
Jejunum-Ileum-Duodenum
Jejunum-Duodenum-Jejunum
Ileum-Duodenum-Jejunum

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Biology
Bone deformities occur due to the excess intake of

Phosphorus
Fatty acid
Fluorine
Potassium

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Biology
Gymnosperms are characterized by the

Presence of seeds in cones
Absence of seeds
Absence of vascular tissues
Presence of flowers

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Biology
Which of the following groups is present in animal cells ?

Vacuole, Cell membrane, Nucleus, Mitochondria
Chloroplasts, Cytoplasm, Vacuole, Nucleus
Mitochondria, Cell membrane, Cell wall, Cytoplasm
Nucleus, Cell membrane, Mitochondria, Cytoplasm

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Biology
Pollen grains in plants are produced in

flower
leaves
stem
roots

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