Stem
Stem: Overview
This Topic covers sub-topics such as Stem, Corms, Thorns, Tendrils, Cladodes, Rhizomes, Modification of Stem, Aerial Stem Modification, Shoot System, Stem Tubers, Underground Stem Modification, Bulbs in Plants, Succulent Stem and, Climbing Stems
Important Questions on Stem
The most reduced form of the stem is found in
Read the following statement:
I. Pneumatophores help the plant root to take air or oxygen.
II. Floating hydrophytes possess well developed root cap.
III. Edible part of Zingiber is underground stem.
IV. Prop roots contain root cap.
V. Cladodes are green stems of limited growth which have taken over the function of photosynthesis from leaves.
How many of the above statements are incorrect?
All the plant parts observed below the soil may not be roots - justify with two examples.
Vegetative propagule of Curcuma is _____.
Which among the following is not a part of the shoot system?
Assertion : Prickles of plant have a single role of protection of plant.
Reason : They are superficial in origin.
Assertion : Stem develops from hypocotyl of embryo.
Reason : Internodes bear axillary buds.
Tip of twiner is sensitive and coils around support itself. This coiling is called
Match the following
| List - I | List - II | List -III |
| A) Acacia | i) Node of stem | I) Mericarp |
| B) Dichasial cyme | ii) False septum | II) Lamiaceae |
| C) Lateral out growth | iii) Monochasial cyme | III) Photosynthesis |
| D) Argemone | iv) Phyllode | IV) Parietal placentation |
The correct answer is
Match the following
| List - I | List - II | List -III |
| A) False septum in Ovary | i) Fig | I) Storage of food and respiration |
| B) Carrot root | ii) Banana | II) Length of Stamen filament varies |
| C) Sucker | iii) Mustard | III) Sub aerial stem modification |
| D) Hypanthodium | iv) Absorption | IV) Blastophaga |
The correct answer is
Which are the modified parts of cladophylls?
Choose the incorrect statements among the following.
A) In rice, the pericarp and the seed coat are free and protect the seed.
B) In Rutaceae, the juicy succulent placental hairs of endocarp are edible.
C) The corolla in Ocimum is bilipped, whereas Datura it is funnel shaped.
D) Underground stem modification only store food material.
The study of external features is called_____.
Match the following:
| List i | List ii | List iii | |||
| A | False septum in Ovary | i | Fig | i | Storage of food and respiration |
| B | Carrot root | ii | Banana | ii | Length of stamen filament varies |
| C | Sucker | iii | Mustard | iii | Subaerial stem modification |
| D | Hypanthodium | iv | Absorption | iv | Blastophaga |
Which of the following statements is correct?
A cladode (cladophyll) is green leaf-like modified aerial stem and is
