Which one of the following plants has modified bilobed leaves with a midrib between them, having long, stiff bristles along the margins of each lobe?
Correct answer: A. Dionaea muscipula
- A. Dionaea muscipula
- B. Drosera excelsa
- C. Drosera intermedia
- D. Nepenthes purpurea
Explanation
Dionaea muscipula, commonly known as the Venus flytrap, has highly specialised leaves that act as snap traps to capture and digest insects. Each leaf is divided into two lobes that hinge together and are lined with hair-like structures called trigger hairs. When an insect touches these trigger hairs, the lobes snap shut, trapping the prey inside. Digestive enzymes are then secreted to break down the insect and absorb nutrients, which help the plant survive in nutrient-poor soils. This adaptation allows the Venus flytrap to obtain nitrogen and other essential nutrients from its prey, supporting its growth in otherwise challenging environments.
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About Plant Nutrition and Transport
Plants require macronutrients and micronutrients for growth, and mineral deficiencies produce recognizable symptoms. Transport involves water and minerals through xylem by transpiration pull, cohesion and adhesion, while phloem translocates sugars from sources to sinks. Root pressure and transpiration are distinct mechanisms.
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