Question

The blood of cockroach contains no respiratory pigment it means that
1) Respiration is anaerobic
2) Cockroach does not respire
3) Oxygen goes directly into tissues by diffusion
4) Oxygen goes into tissue by intracellular capillary system
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Answer 1

Answer:

option 3 is correct

Explanation:

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Answer 2

Answer:

3) Oxygen goes directly into tissues by diffusion.

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