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प्रश्न
Give scientific reasons: We cannot distinguish colours in moonlight.
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उत्तर
Cone cells in the retina are responsibe for colour vision. They are functional only in bright light. Moon light is unable to stimulate the cone cells; however, the rod cells respond to dim light. Hence, we can see in moon light but cannot distinguish colours.
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संबंधित प्रश्न
Given below is a representation of a kind of pollution. Study the same and answer the questions that follow

(i) Name the kind of pollution.
(ii) List any three common sources of this pollution.
(iii) Mention three harmful effects of this pollution on human health.
(iv) Explain the term ‘Pollutant’.
(v) Name two soil pollutants
Differentiate between members of the following pair with reference to what is asked in bracket.
Semi-circular canal and cochlea (Senses perceived)
Differentiate between members of the following pair with reference to what is asked in bracket.
Dynamic balance and static balance (Definition)
Mention if the following statement is true (T) or false (F) Give reason.
The auditory nerve is purely for perceiving sound
Given below is the diagram of a part of the human ear. Study the same and answer the questions that follow:
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Give the collective biological term for Malleus, locus and Stapes.
Name the following:
Part of internal ear related to balance.
Draw a labeled diagram of the inner ear. Name the part of the inner ear that is responsible for static balance in human beings.
Long answer question
Draw the neat labelled diagram of the human ear.
Mention the name of passage is the outer ear which carries sound waves to the eardrum.
Give reason:
Three small bones of ear ossicles are advantageous as compared to one single bone for hearing.

