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In plants, waste products like gases are excreted through ___________.

Plants produce two gaseous waste products i.e. oxygen during photosynthesis and carbon dioxide during respiration. The excretion of gaseous waste in plants takes place through stomatal pores on leaves. Oxygen released during photosynthesis is used for respiration while carbon dioxide released during respiration is used for photosynthesis.

Excess water is also excreted from the plant body through the stomatal pores and from the surfaces of fruits and stems. The process of elimination of water is called transpiration.