Why do carnivorous insectivorous plants like pitcher plants (Nepenthes) and sundews (Drosera) trap and digest insects in their natural habitats?
Answer and explanation
Correct answer: B. to obtain nitrogen compounds in waterlogged, nutrient-poor bogs and acidic soils
- Step 1: Carnivorous plants possess green photosynthetic leaves and synthesize their own carbohydrates via photosynthesis. Step 2. However, they grow in acidic, boggy soils that are deficient in available nitrates. Step 3. Trapping and digesting insects provides an external source of organic nitrogen and minerals. Answer: to obtain nitrogen compounds in waterlogged, nutrient-poor bogs and acidic soils. Why not the others: They are photosynthetic autotrophs, not heterotrophs for carbon; they inhabit moist bogs, not arid deserts.
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