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Why a plant cannot survive for long time at compensation point ?


A plant cannot survive for long at compensation point because there is a net loss of organic matter due to respiration of non-green organ and respiration in dark. Thus, the plants after sometime th e plant cannot meet the requirements of food syntheisis and thus it may die. 
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What does the chemiosmotic hypothesis state?

According to this hypothesis in photosynthesis ATP synthesis is linked to development of a proton gradient across a membrane. 

 

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Name the products of light reaction and where they are used ?

Products of light reaction are ATP, NADPH and O2 of these O2 diffuses out of the chloroplast while ATP and NADPH are used to drive these processes leading to synthesis of food that is sugars.
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 Name two green house crops. What is the type of these plants and why are they used in the green houses?

Tomatoes and bell pepper are the two green house crops. They are C3 plants. They are used in the green houses as they respond to higher CO2 concentrations by showing increased rates of photosynthesis which in turn leads to higher yield. These are allowed to grow in carbon dioxide enriched atmosphere that leads to higher yields.
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