Is this biology mark scheme wrong? (Gas exchange in inswcrs
As you can see the A is connected to the side of the insect and it is a open channel from the inside to the outside. That is the spiracle!
And the tracheoles are in contact with the tissues, which you can see on the second drawing.
And the tracheoles are in contact with the tissues, which you can see on the second drawing.
No that's correct
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