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Q. No.Stomata in grass leaves are:
1.
Dumb-bell shaped
2.
Kidney shaped
3.
Rectangular
4.
Barrel-shaped
Subtopic: Epidermal Tissue System |
92%
Level 1: 80%+
NEET - 2018
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Secondary xylem and phloem in dicot stem are produced by?
| 1. | Apical meristems | 2. | Vascular cambium |
| 3. | Phellogen | 4. | Axillary meristems |
Subtopic: Dicot Stem |
85%
Level 1: 80%+
NEET - 2018
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Subtopic: Anatomy of Root |
77%
Level 2: 60%+
NEET - 2018
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Plants having little or no secondary growth are:
| 1. | Grasses | 2. | Deciduous angiosperms |
| 3. | Conifers | 4. | Cycads |
85%
Level 1: 80%+
NEET - 2018
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Read the different components from I to IV in the list given below and tell the correct order of the components with reference to their arrangement from the outer side to the inner side in a woody dicot stem.
| I. | Secondary Cortex |
| II. | Wood |
| III. | Secondary phloem |
| IV. | Phellem |
The correct order is:
| 1. | III, IV, II, I | 2. | I, II, IV, III |
| 3. | IV, I, III, II | 4. | IV, III, I, II |
Subtopic: Dicot Stem |
56%
Level 3: 35%-60%
NEET - 2015
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Tracheids differ from the tracheary elements in:
| 1. | Having casparian strips | 2. | Being imperforate |
| 3. | Lacking nucleus | 4. | Being lignified |
Subtopic: Complex Tissue: Xylem |
Level 3: 35%-60%
AIPMT - 2014
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Gymnosperms are also called softwood spermatophytes because they lack:
1. Cambium
2. Phloem fibres
3. Thick-walled tracheids
4. Xylem fibres
Subtopic: Complex Tissue: Xylem |
Level 3: 35%-60%
AIPMT - 2012
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Ground tissue includes:
| 1. | all tissues except epidermis and vascular bundles |
| 2. | epidermis and cortex |
| 3. | all tissues internal to endodermis |
| 4. | all tissues external to endodermis |
Subtopic: Ground Tissue System |
90%
Level 1: 80%+
AIPMT - 2011
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The cork cambium, cork and secondary cortex are collectively called:
1. phellogen
2. periderm
3. phellem
4. phelloderm
1. phellogen
2. periderm
3. phellem
4. phelloderm
Subtopic: Activity of Cork Cambium |
75%
Level 2: 60%+
AIPMT - 2011
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The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is:
1. maturing
2. elongating
3. widening
4. differentiating
Subtopic: Anatomy of Root |
Level 4: Below 35%
AIPMT - 2009
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