Question Bank - Environmental Studies

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Consider the following statements about Nepenthes.(A) This plant can trap and eat insects, frogs, and even mice(B) This plant is not found in our country(C) This plant emits a pleasant sound to attract insects(D) It has a pitcher-like shape with mouth covered with a leaf. Any insect that lands on its mouth gets trapped and can not get outThe correct statements are

A.
A and B only
B.
A and D
C.
A, B and C
D.
A, C and D

Solution:

Concept:Nepenthes:The pitcher plant is an insectivorous plantIt has a Pitcher-like structure that is the modified part of the leaf.The apex of the leaf forms a lid that can open and close the mouth of the pitcher.Inside the pitcher, there are hairs that are directed downwards.When an insect lands in the pitcher, the lid closes and the trapped insect gets entangled into the hair.The insect is digested by the digestive juices secreted in the pitcher.It can trap and eat frogs, insects and even mice.It is found in Australia, Indonesia and Meghalaya in India.It has a pitcher-like shape and the mouth is covered by a leaf.It has a special smell that attracts insects to it, which get trapped and can't get out.These plants trap insects and obtain the nutrients which they do not get from the soil as they grow in nitrogen-deficient soils.Hence they are both producers and carnivores.PlantTrapping techniquePitcher PlantLeaves transformed into a slippery deep pool containing digestive juices.Insects fall into these pools and plant digests them.Venus FlytrapIt has snap traps, which snap shut when touched by insects.SundewIt has a sticky substance on its surface that looks like dews.The insect gets stuck on it and digestive juices digest it by the time.Explanation:Nepenthes is a plant that:(A) This plant can trap and eat insects, frogs and even mice - True(B) This plant is not found in our country - False (found at Meghalaya)(C) This plant emits a pleasant sound to attract insects - False(D) It has a pitcher-like shape with mouth covered with a leaf. Any insect that lands on its mouth gets trapped and can not get out - TrueSo option A and D is right answer

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