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life

Asked by hemant2020 21st May 2010, 7:46 PM
Answered by Expert
Answer:

Plants do not breathe, they only respire. Animals usually breathe in the air for carrying out cellular respiration.

 

Plants lack a respiratory system, which is usually found in animals.

 

 

 In plants, the leaf obtains oxygen directly from the air through the stomata. Stems and roots also take in oxygen. In case of animals, oxygen is taken in through special openings (like nostrils or gill clefts) into the respiratory organ.

 

In animals, there is a respiratory organ (like lungs, gills, etc.) present within the body, where exchange of gases occurs. No such respiratory organ is present in plants.

 

 

The carbon dioxide produced in animals during respiration is released to the atmosphere, whereas the carbondioxide produced during plant respiration may be used by the plant for carrying out photosynthesis.

 

There is no respiratory pigment in case of plants, whereas in animals, respiratory pigments play an important role in transporting oxygen to the cells.

 

 

Respiration in plants can also proceed in a manner that produces neither metabolic energy nor carbon skeletons, but heat. This type of respiration involves the cyanide-resistant, alternative oxidase; it is unique to plants, and resides in the mitochondria.

Answered by Expert 22nd May 2010, 11:25 AM
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