Question

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Answer 1

Answer:

1) movement, respiration, growth, reproduction, excretion and nutrition.

2) gas exchange

3) The trachea then divides into two smaller tubes called bronchi: one bronchus for each lung. The trachea is composed of about 20 rings of tough cartilage.

4) Resultant carbon dioxide passed through limewater in the right tube, producing a milky solution due to precipitation of the insoluble suspension of calcium carbonate: Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O. ... The milkiness disappears since calcium bicarbonate is water-soluble.

5) respiration

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Answer 2

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