Question

Plants do not have special organs to get rid of the waste substances. Certain excretory products
secreted by plants are useful to mankind. Make a Project Report by finding out the names of
such plants and their pictures. Also mention any one use of each product derived from these
plants
. You can consult library books, magazines, newspapers and internet for reference​

Answer 1

Excretion in plants takes place mainly by transpiration and guttation because the plant does not have specialized excretory organs for excretion of waste. Excretion of the waste product like carbon dioxide, oxygen, and water excreted out through stomata and lenticel.

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Answer 2

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.

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