Question

The air tubes of insects
Skeletal structures surrounding chest cavity
(1) Muscular floor of chest cavity
(iv) Tiny pores on the surface of leaf
(v) Small openings on the sides of the body of an insect
(vi) The respiratory organs of human beings
(vii) The openings through which we inhale
(viii) An anaerobic organism
fbxd) An organism with tracheal system
9. The mountaineers carry oxygen with them because:
(a) At an altitude of more than 5 km there is no air.​

Answer 1

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Explanation:

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