Excretion in Plants
Excretion in Plants
Excretion in Plants:
Compared to animals, plants do not have a well-developed excretory system to remove nitrogenous waste materials. This is because of the differences in their physiology. Therefore, plants use different strategies for excretion.
The gaseous waste materials produced during respiration (carbon dioxide) and photosynthesis (oxygen) diffuse out through stomata in the leaves and through lenticels in other parts of the plant. Excess water evaporates mostly from stomata and also from the outer surface of the stem, fruits, etc., throughout the day. This process of getting rid of excess water is called transpiration.
The waste products, like oxygen, carbon dioxide and water, are the raw materials for other cellular reactions. The excess of carbon dioxide and water are used up in this way. The only major gaseous excretory product of plants is oxygen.
Which of the following are correct ? (a) The gaseous waste materials produced during respiration and photosynthesis diffuse out through stomata in the leaves and through lenticels in other parts of the plant . (b) The leaves of many plants, like Eucalyptus, lemon, sacred basil etc.contain essential oils. (c) The Quinine and morphine are medicines derived from alkaloids stored in Cinchona bark and opium poppy flowers respectively. | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following are correct ? (a) Different type of waste products get diffused out of the plant body through epidermis(outer covering) . (b) The waste products are carbon dioxide, excess of water, excess of salts, gums,resins and latex. (c) Carbon dioxide is formed after respiration and oxygen is formed after photosynthesis. | |||
| Right Option : D | |||
| View Explanation | |||
The excretory gases of plants are ___________ | |||
| Right Option : B | |||
| View Explanation | |||
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