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Which of the following is/are true? I. Banyan has prop roots. II. Banana is a herb. III. Nepenthes eat insects to get nitrogen. IV. Desert oak has water stored in its trunk.

Which of the following is/are true? I. Banyan has prop roots. II. Banana is a herb. III. Nepenthes eat insects to get nitrogen. IV. Desert oak has water stored in its trunk. Correct Answer I, II, III and IV

Concept:

  • Roots are the underground structures that help in the absorption of water and minerals provide a proper anchorage to the plant parts, storage of reserve food material (Carrot, Radish), and synthesis of PGR (plant growth regulators).
  • Sometimes roots get modified to perform different functions like storage of food, respiration, climbing, etc.
  • These types of roots are called modified roots.
  • Examples - prop root of the Banyan tree for providing support, Pneumatophores of Rhizophora, and Mangrove plants for respiration.

Explanation:

Banyan:

  •  Prop roots are the modified roots that arise from the stem and provide extra support.
  •  Banyan has prop roots that further mature into thick trunks.
  •  These trunks cannot be distinguished from the primary trunk.
  •  Such roots can also be found in corn, rubber, and fig plants.

Banana:

  • Herb is a seed-bearing plant that does not have a woody stem.
  • Banana is a herb as it never forms a woody stem, it has a Pseudostem.
  • The pseudostem is a false stem that is found in a few plants.

Nepenthes:

  • The pitcher plant is an insectivorous plant
  • It 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.

Desert Oak:

  • It is found in the dry and arid regions of Australia. It grows almost 10 ft tall.
  • It has very few leaves Its roots go very deep in search of water.
  • The depth of these roots is nearly 30 times the height of the tree. 
  • This water is stored in the tree trunk. 
  • Local people use a thin pipe to drink this water.

Thus,

Banyan has prop roots- True

Banana is a herb- True

Nepenthes eat insects to get nitrogen- True

Desert oak has water stored in its trunk- True

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