National Science Olympiad Forum By SOF Olympiad Trainer - Page 197

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 4
you stink

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 8

Consider the following statements (a - d) each with one or two blanks.
I. In our body, _(1)_ is the longest cell while _(2)_ is the smallest cell.
II. Cell membrane in animal cells is _(3)_
III. Mitochondria is absent in _(4)_
IV. _(5)_ are membraneless organelles of cell and are involved in synthesis of _(6)_
Select the correct option to fill any three or four blanks.

A1 - Neuron, 2 - PPLO , 4 - bacteria
B3 - Permeable , 5 - Ribosomes, 6 - proteins
C3 - Selectively permeable , 1 - Neuron, 2 - RBC
D3 - Impermeable , 4 - human RBCs , 6 - lipids


Ans 1:

Class : Class 6

Ans 2:

Class : Class 10
C

Ans 3:

Class : Class 10
C

Ans 4:

Class : Class 8
In my opinion, neither of the options fulfils the blanks correctly. According to the solution, the smallest cell in the human body (assuming the pronoun 'our' refers to the human race) is RBC (erythrocyte), but it is, in fact, the second smallest cell. The smallest cell in the human body is the sperm cell. Thus, option (A) and option (C) are incorrect. PPLO (Pleuro-pneumonia-like-organism) are the smallest cells, but they are not human cells. RBC are the second smallest cells in the human body, not the smallest cell. Option (B) and option (D) are incorrect too. The cell membrane is neither completely permeable, nor impermeable. The cell membrane is selectively permeable, which means it allows only certain molecules to enter and exit the cell. Thus, none of the options are correct.

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Subject :NSO    Class : Class 1

Ans 1:

Class : Class 2

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
c

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Subject :NSO    Class : Class 7

Read the given statements and select the correct option.
Statement 1 : All food chains are linked; if any one food chain is disturbed, it affects other food chains.
Statement 2 : In a food chain, energy and nutrients are passed on from one organism to another.

ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true and statement 2 is false.
DStatement 1 is false and statement 2 is true.


WHY B ISNT IT C?

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
Yes, it should be 3rd from the left, not right. Even In the diagram in the solution it is clearly visible.

Ans 2:

Class : Class 8
they are facing the center, so from the perspective of f, c should be 3rd from the right end.

Ans 3:

Class : Class 8

Ans 4:

Class : Class 7

Ans 5:

Class : Class 8
i think it should be 5th to the right and 3rd to the left...

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8

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