Question

(i) What are the different strategies used by the plants for excretion?
(ii) How do kidneys maintain a steady internal environment in our body?​

Answer 1

1)The various methods used by plants to get rid of their waste products are: Gaseous waste through stomata and lenticels. Stored solid and liquid waste by shedding leaves, peeling of bark and falling of fruits. By secreting waste in the form of gum and resins.

2)Kidneys perform a number of homeostatic functions. They maintain the volume of body fluids. They maintain the balance of salt ions in body fluids. They excrete harmful nitrogen-containing molecules, such as urea, ammonia, and uric acid.

Answer 2

1) Strategies used by plants for excretion are :

(i) They can get rid of excess water and oxygen through stomata.

(ii) Many plant waste products are stored in cellular vacuoles.

(iii) Waste products may be stored in leaves that fall off.

(iv) Waste products are stored as resin and gums, especially in old xylem.

2)Kidneys perform a number of homeostatic functions. They maintain the volume of body fluids. They maintain the balance of salt ions in body fluids. They excrete harmful nitrogen-containing molecules, such as urea, ammonia, and uric acid.

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