Which plant opens its lid to trap insects when they sit on it?

The correct answer is Pitcher Plant.The Pitcher Plant (scientifically known as Nepenthes or Sarracenia) is a famous carnivorous plant. Unlike most plants that get all their nutrients from the soil, pitcher plants have evolved to "eat" insects to survive in... Read More

1 GENERAL KNOWLEDGE MCQS

Which plant opens its lid to trap insects when they sit on it?

  • Sunflower
  • Pitcher Plant
  • Brassica Plant
  • None of these
Correct Answer: B. Pitcher Plant

Detailed Explanation

The correct answer is Pitcher Plant.The Pitcher Plant (scientifically known as Nepenthes or Sarracenia) is a famous carnivorous plant. Unlike most plants that get all their nutrients from the soil, pitcher plants have evolved to "eat" insects to survive in environments where the soil is nutrient-poor, particularly lacking in nitrogen.


How the Trap Works:


The "pitcher" is actually a modified leaf that has developed into a deep, slippery container filled with digestive liquid.



  • The Lure: The plant uses bright colors and sweet-smelling nectar to attract insects to the rim of the pitcher.

  • The Slip: The rim is extremely slippery. When an insect lands on it, it loses its footing and falls into the hollow tube.

  • The Lid: While popular belief suggests the lid "snaps" shut like a mouth, its primary role is to act as a roof to prevent rainwater from diluting the digestive enzymes inside. However, once the insect is inside, the slippery walls and downward-pointing hairs prevent it from escaping.


Digestion and Nutrition:


Once the insect is trapped in the fluid at the bottom, the plant secretes enzymes (similar to those in a human stomach) that break down the insect's body. The plant then absorbs the nitrogen and phosphorus it needs to grow.


Comparison of the Options:



  • Sunflower: A heliotropic plant that turns to face the sun. It is not carnivorous and gets its nutrients through photosynthesis and soil.

  • Pitcher Plant: The correct answer, belonging to the group of carnivorous plants that use "pitfall traps."

  • Brassica Plant: A genus of plants in the mustard family (including broccoli and cabbage). They are standard photosynthetic plants.

  • None of these: Incorrect, as the Pitcher Plant is a well-documented example of this behavior.

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