- 1(current)
Q. No.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 |
From NCERT
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Give below are two statements :
In the light of the above statements, choose the correct answer from the options given below:
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
| Statement I: | Endarch and exarch are the terms often used for describing the position of secondary xylem in the plant body. |
| Statement II: | Exarch condition is the most common feature of the root system. |
In the light of the above statements, choose the correct answer from the options given below:
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
Subtopic: Dicot Stem |
59%
From NCERT
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In dicot stems, each vascular bundle is:
1. conjoint, open, and with endarch protoxylem.
2. conjoint, closed, and with endarch protoxylem.
3. radial, open, and with endarch protoxylem.
4. conjoint, open, and with exarch protoxylem.
1. conjoint, open, and with endarch protoxylem.
2. conjoint, closed, and with endarch protoxylem.
3. radial, open, and with endarch protoxylem.
4. conjoint, open, and with exarch protoxylem.
Subtopic: Dicot Stem |
89%
From NCERT
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In the transverse section of a dicot stem, the correct chronological order of the appearance of the following structures [from epidermis towards pith] will be:
| 1. | Hypodermis – Pericycle – Endodermis – Vascular bundles |
| 2. | Vascular bundles – Pericycle – Endodermis – Hypodermis |
| 3. | Hypodermis – Endodermis – Pericycle – Vascular bundles |
| 4. | Vascular bundles – Endodermis – Pericycle – Hypodermis |
Subtopic: Dicot Stem |
89%
From NCERT
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The number of correct statements regarding anatomy of dicot stems is:
1. 1
2. 2
3. 3
4. 4
| Statement I: | Hypodermis consists of a few layers of collenchymatous cells. |
| Statement II: | The cells of the endodermis are rich in protein granules. |
| Statement III: | Pericycle is in the form of semi-lunar patches of sclerenchyma. |
| Statement IV: | The ‘ring’ arrangement of vascular bundles is a characteristic of dicot stem. |
2. 2
3. 3
4. 4
Subtopic: Dicot Stem |
69%
From NCERT
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