1) Why is it necessary to excrete waste products?
2) Give an account of production of new plants by cutting.
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Answer:
Answer:
The waste materials produced during the metabolic activities are toxic to the body and must not be accumulated inside, and therefore it has to be excreted out from the body by the process of excretion.
Importance of excretion
Certain waste and harmful substances are formed during the functioning of body cells. Examples of such harmful waste products are urea, etc. When these toxic materials are not removed from the body, they get mixed with blood and can damage the cells of the body. The removal of such poisonous waste materials is therefore necessary.
Answer:
Q1) Why is it necessary to excrete waste products?
Solution:-
When our cells perform their functions, certain waste products are released. These are toxic and their accumulation in the body may lead to fatal consequences, hence they need to be removed.
Q2) Give an account of production of new plants by cutting?
Solution:-
New plants can be obtained from the stem (or branch) of an existing plant by the method of cutting. A small part of stem or branch of an existing plant having at least one bud on it, is cut with a sharp knife. This gives a stem cutting which is buried in the moist soil and is watered everyday. After a few days, the cutting develops roots, the bud grows and produces a shoot or a new plant. The plants like rose, money plant, grapes, sugarcane, banana, cactus can be grown by cutting method.
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