Question

na human beings, excretory products in the form of soluble nitrogen compounds
are removed by the nephrons in the kidneys.
lants use a variety of techniques to relojes bras e material. For example, waste
material may be stored in the cell-vacuoles or as gum and resin, removed in the
alling leaves, or excreted into the surrounding soil,
Chapter 8
How do Origanume
Reproduce
e what is importance of DNA
in reproduction

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Answer 1

The method used by plants to get rid of excretory products are as follows:

(i) The oxygen, end product of the photosynthesis gets removed through stomata.

(ii) The carbon dioxide which is produced during the process of respiration also gets removed through stomata.

(iii) The excess of water gets removed through transpiration.

(iv) Some other wastes get removed along with dead cells when plant lose some parts such as leaves.

(v) Some waste products are stored in cellular vacuoles.

(vi) Some waste products are stored as resins and gums, especially in old xylem.

(vii) Plants also excrete some waste substances into the soil around them.

(viii)Some waste substance are also eliminated through petals, fruits and seeds.

Therefore, the correct answer is option D.

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