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B
Thin green leaves with parallel venation
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C
Fleshy green leaves
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D
Thin coloured leaves
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Solution
The correct option is C Fleshy green leaves Certain plants such as succulents with fleshy green leaves which grow under extremely xerophytic conditions fix atmospheric carbon dioxide in dark. Since the process was first observed in plants belonging to family Crassulaceae, it was termed Crassulacean acid metabolism (CAM). The most characteristic feature of these plants is that their stomata remain open at night but closed during the day. It is a kind of adaptation to carry out photosynthesis without much los s of water. For example, Bryophyllum, Kalanchoe, Sedum etc.