CBSE Class 7 Answered
Green plants which obtain their food partly from insects are called insectivorous or carnivorous plants. They are mostly found in soils which do not contain sufficient nitrogen mineral. These plants trap insects, kill them and digest them to obtain nitrogenous compounds for their growth. Since they are green, they can carry out photosynthesis to obtain a part of their food. So, the basic purpose of feeding on insects is to obtain nitrogen. Therefore, it is less likely that a carnivorous plant will feed on another carnivorous plant as both of them lack nitrogen.
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