Plant Morphology - Types and Modifications
Covers classification of plants by life span and growth habit, stem modifications (underground stems, tendrils, phylloclades), and anatomical structures for class-XI students
Questions
Find the wrong statement in the following.
- Animal fibres are proteins
- Plant fibres are fats
- Rearing of silk worms is called Sericulture
- Separation of silk fibre from cocoon is called Reeling
Small plants which live for one or two seasons are
- Herbs
- Shrubs
- Trees
- Algae
A plant has weak stem which can coil around an upright support. It is a
- Liane
- Twiner
- Climber
- Creeper
Which of the following can be related to the creepers?
- The stem is fragile
- They creep on the ground
- They have floating roots
- Both A and B
Stem tendrils occur in
- Smilax
- Gloriosa
- Vitis
- Lathyrus
Pea plant is a creeper.
- True
- False
Climbers are advanced than creepers.
- True
- False
Culm is found in
- Ginger
- Mango
- Bamboo
- Guava
Read the following matches.
| (i) Lily | Compound tunicated bulb |
|---|---|
| (ii) Potato | Tuber |
| (iii) Allium cepa | Simple tunicated bulb |
| (iv) Allium sativum | Scaly bulb |
Which of these are correct?
- (i), (ii) and (iii)
- (ii), (iii) and (iv)
- (ii) and (iii)
- (iii) and (iv)
Which of the following parts of plants in garlic and onion are edible?
- Underground stem
- Fleshy scale leaves
- Tunic
- Adventitious root
A weak stem which itself coils around the support is called
- Twiner
- Scrambler
- Liana
- None of the above
Pisum sativum is a
- Climber
- Tree
- Shrub
- Heterotroph
Date Palm is?
- Caudex
- Excurrent
- Deliquescent
- Culm
Underground stems are primarily meant for
- Vegetative reproduction
- Perennation
- Protection from strong light
- Anaerobic respiration
In one plant, underground stems are modified to store food and in another plant, the stem tendrils develop from axillary buds to help plant climb. They are
- Ginger, Cucumber
- Carrot, Jasmine
- Sweet Potato, Bougainvillea
- Opuntia, Eichhornia
- Sweet Potato, Mint
The special structures used by the climbers for climbing are
- Root
- Tendrils
- Stem
- None of the above
Which of the following is not a creeper?
- Pumpkin
- Watermelon
- Sweet Potato
- Grapevine
Which of the following plants possesses culm?
- Cuscuta
- Zingiber
- Bamboo
- Cocos
Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by :
- Position of protoxylem
- absence of secondary xylem
- Absence of secondary phloem
- Presence of cortex
Following are the comparisons between phylloclades and cladodes (cladophylls).
| Phylloclade | Cladode | |
|---|---|---|
| (i) | Both main stem and branches are modified to function like leaves. | Only the branches are modified to take over the function of leaves. |
| (ii) | Phylloclade has limited or definite growth. | Cladode has unlimited or indefinite growth. |
| (iii) | It consist of several nodes and internodes. | It is usually one internode long |
| (iv) | True leaves are commonly caducous. | True leaves are either reduced to scales or modified to spines. |
| (v) | Example: Rescus aculeatus, Asparagus etc. | Example:Opuntia, Euphorbia royleana etc. |
Pick up the wrong difference and select the correct option.
- (i) and (ii)
- (ii) and (v)
- (iii) and (v)
- (ii) and (iv)
From the following, which plant has a disk-like stem?
- Pineapple
- Mango tree
- Banyan tree
- Onion
One internode long runner stem of aquatic plants is called
- Stolon
- Trailer
- Offset
- None of the above
Succulent stem occurs in
- Pisum
- Casuarina
- Euphorbia
- Oxalis
Choose the correct answers from the alternatives given.
Annual rings are the number of
- Rings of vascular bundles in a monocot stem
- Layers of secondary xylem in a stem
- Internodes in a stem
- Both (b) and (c)
Choose the correct answers from the alternatives given.
During the secondary growth in the dicotyledonous stems the cork cambium gives rise to
- Secondary xylem and secondary phloem
- Secondary cortex and cork
- Pith and medullary rays
- Multicellular hairs