Careers360 Logo
NEET College Predictor 2024 Predict Your College Based on NEET Marks

Modification of the Underground Stem - Practice Questions & MCQ

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET

Quick Facts

  • Modification of the Underground Stem is considered one of the most asked concept.

  • 12 Questions around this concept.

Solve by difficulty

Which one of the following is correctly matched

An example of edible underground stem is :

Concepts Covered - 1

Modification of the Underground Stem

Modification of the Underground Stem

  • Underground stem may appear to be root but show features of stem like distinct nodes and internodes.
  • They bear scaly non-green leaves with axillary buds.
  • These act as organ of perennation and storage of food.

Rhizome

  • It is fleshy, non-green, underground stem.
  • There is a clear demarcation of nodes and internodes.
  • They have terminal bud as well as axillary bud.
  • Axillary buds are present in the axils of each scaly leaf. 
  • They can give rise to new shoots.
  • For example, Ginger, turmeric, banana, etc.

Stem Tuber

  • Stem tubers are swollen underground branches (stolons).
  • These are swollen due to storage of food.
  • These are covered with corny skin and small depressions called eyes.
  • Each eye represents node.
  • These can sprout and produce new shoots.
  • They lack adventitious roots.
  • For example, potato

Bulb

  • These are highly condensed discoid stems.
  • The upper surface is conical and bears apical bud.
  • There are numerous scaly leaves which store food.
  • When scaly leaves surround the apical bud in the form of concentric rings, it is called tunicated bulb, for example, onion.
  • When scaly leaves partially surround the apical bud, it is called scaly bulb, for example, garlic.
  • From the lower surface, adventitious roots arise.

Corm

  • It is condensed rhizome which grows vertically downwards.
  • It has a flattened base.
  • There are distinct circular nodes and internodes.
  • The scaly leaves and axillary buds arise from the nodes.
  • Adventitious roots may arise at nodes or all over the body.
  • For example, colocasia, zaminkand (yam), saffron, etc.

Study it with Videos

Modification of the Underground Stem

"Stay in the loop. Receive exam news, study resources, and expert advice!"

Get Answer to all your questions

Back to top