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Respiration in insects Is called direct ...

Respiration in insects Is called direct because

A

the tissues exchange `O_2//CO_2` directly with the air in the tubes

B

the tissues exchange `O_2//CO_2` directly with coelomic fluid

C

the tissues exchange `O_2//CO_2` directly with the air outside through body sur- face

D

tracheal tubes exchange`O_2//CO_2` directly with the haemocoel which then ex- change with tissues

Text Solution

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The correct Answer is:
d
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  • Ion uptake is called active because

    A
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    B
    ions move freely
    C
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    D
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