- 1(current)
Q. No.The number of features seen in a dicotyledonous stem from among the features given below is:
| I: | Sclerenchymatous pericycle |
| II: | Casparian strips in endodermis are very common |
| III: | Collechymatous hypodermis |
| IV: | Conjoint open vascular bundles with exarch protoxylem |
| 1. | 4 | 2. | 3 |
| 3. | 2 | 4. | 1 |
Subtopic: Dicot Stem |
57%
Level 3: 35%-60%
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In a dicot stem:
1. Only a and b are correct
2. Only a and c are correct
3. Only b and c are correct
4. a, b and c are correct
| a. | Hypodermis has collenchymatous cells. |
| b. | Endodermis is the ‘starch sheath’. |
| c. | Pericycle is parenchymatous. |
1. Only a and b are correct
2. Only a and c are correct
3. Only b and c are correct
4. a, b and c are correct
Subtopic: Dicot Stem |
Level 3: 35%-60%
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Read the following statements about dicot stem and
choose the correct option.
| (a) | Vascular bundles are arranged in a ring. |
| (b) | Vascular bundles are conjoint, collateral and open type. |
| (c) | Endarch type of arrangement of secondary xylem. |
| 1. | Only (b) is correct |
| 2. | Only (c) is incorrect |
| 3. | Both (a) and (b) are incorrect |
| 4. | All three statements are correct |
Subtopic: Dicot Stem |
Level 3: 35%-60%
Hints
Consider the following tissues in the stellar region of a stem showing secondary growth.
(A) Primary xylem
(B) Secondary xylem
(C) Primary phloem
(D) Secondary phloem
Arrange these in the correct sequence of their position from pith towards cortex.
(A) Primary xylem
(B) Secondary xylem
(C) Primary phloem
(D) Secondary phloem
Arrange these in the correct sequence of their position from pith towards cortex.
| 1. | (A), (B), (D), (C) | 2. | (B), (A), (C), (D) |
| 3. | (A), (B), (C), (D) | 4. | (B), (A), (D), (C) |
Subtopic: Dicot Stem |
Level 3: 35%-60%
NEET - 2023
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The presence of protoxylem lacuna is considered a characteristic anatomical feature of:
| 1. | Dicot stem, due to early disintegration of protoxylem elements |
| 2. | Monocot stem, resulting from the breakdown of protoxylem during development |
| 3. | Dicot root, due to radial arrangement of vascular tissues |
| 4. | Monocot root, due to presence of large pith |
Subtopic: Vascular Tissue System | Anatomy of Root | Dicot Stem | Monocot Stem |
Level 3: 35%-60%
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- 1(current)
Q. No.
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