National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 3

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Class : Class 4

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Class : Class 4
B. Rabbit gnaws and frog swallows.

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Class : Class 3
B

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Subject :NSO    Class : Class 4

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Class : Class 5

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 5

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Answer C - 15 Explanation 6 x 6 = 36 - 1 = 35 8 x 8 = 64 - 1 = 63 4 x 4 = 16 - 1 = 15

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sorry

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Subject :NSO    Class : Class 8

Refer to the given statements and select the option that corrects underlined word wherever necessary.
I. Endoplasmic reticulum is responsible for packaging and transporting products of glandular cells.
II. Vacuoles contain chemical substances that digest intra and extracellular materials.
III. Ribosomes are membranous structures found scattered in the cytoplasm of all cells.
IV. Mitochondria are absent in mature mammalian red blood cells.

AEndoplasmic reticulum in I must be replaced by Golgi apparatus whereas membranous in III must be replaced by non-membranous.
BVacuoles in II must be replaced by Centrosomes whereas membranous in III should not be replaced as it is correctly mentioned.
CRed blood cells in IV must be replaced by sperms.
DEndoplasmic reticulum in I must be replaced by Peroxisome whereas Vacuoles in II must be replaced by Lysosomes.


answer is a

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 7

Study the given differences between two blood vessels.

Identify X and Y and select the correct option.

A Walls of X are permeable to gases and other substances whereas walls of Y are impermeable to gases and other substances.
B X carries deoxygenated blood except pulmonary vein whereas Y carries oxygenated blood except the pulmonary artery.
C A series of valves are present in Y which help to prevent back flow and allow blood to flow only towards the heart.
D All of these.


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Subject :NSO    Class : Class 7

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