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Subject :NSO    Class : Class 7

The following investigation was carried out using flower buds growing on three plants of the same species :
Plant 1 – The anthers were carefully removed and the buds left open to the air.
Plant 2 – The anthers were left untouched and a paper bag was tied tightly around each bud.
Plant 3 – The anthers were carefully removed and a paper bag was tied tightly around each bud.
All flowers were opened normally but only those on plant 1 produced seeds.
What can be inferred from it?

A Only cross-pollination can take place in this plant species.
B Only wind-pollination can take place in this plant species.
C Only insect-pollination can take place in this plant species.
D Both self and cross-pollination can take place in this plant species.


Ans 1:

Class : Class 7
There used to be anthers so it is D

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
thank you for explanation : |

Ans 2:

Class : Class 7
The correct answer is A) P as Pulmonary Artery has the least concentration of oxygen.

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 2

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