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Q. No.| 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 true.
2. Both Statement I and Statement II are true.
3. Both Statement I and Statement II are false.
4. Statement I is correct but Statement II is false.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| Assertion (A): | Late wood has fewer xylary elements with narrow vessels. |
| Reason (R): | Cambium is less active in winters. |
| 1. | (A) is false but (R) is true. |
| 2. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are true but (R) is NOT the correct explanation of (A). |
| 4. | (A) is true but (R) is false |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| A. | Lenticels are the lens-shaped openings permitting the exchange of gases. |
| B. | Bark formed early in the season is called hard bark. |
| C. | Bark is a technical term that refers to all tissues exterior to vascular cambium. |
| D. | Bark refers to periderm and secondary phloem. |
| E. | Phellogen is single- layered in thickness. |
Choose the correct answer from the options given below:
| 1. | B and C only | 2. | B, C and E only |
| 3. | A and D only | 4. | A, B and D only |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| 1. | Monocot root | 2. | Dicot root |
| 3. | Dicot stem | 4. | Monocot stem |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology(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) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology(A) Axillary buds
(B) Fascicular vascular cambium
(C) Interfascicular cambium
(D) Cork cambium
(E) Intercalary meristem
Identify the lateral meristems among the above
| 1. | (A), (C) and (D) only | 2. | (B), (C) and (D) only |
| 3. | (A), (B), (C) and (E) only | 4. | (A), (B), (D) and (E) only |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| a. | In roots, xylem and phloem in a vascular bundle are arranged in an alternate manner along the different radii. |
| b. | Conjoint closed vascular bundles do not possess cambium. |
| c. | In open vascular bundles, cambium is present in between xylem and phloem. |
| d. | The vascular bundles of dicotyledonous stem possess endarch protoxylem. |
| e. | In monocotyledonous root, usually there are more than six xylem bundles present. |
Choose the correct answer from the options given below:
1. (a), (c), (d) and (e) only
2. (a), (b) and (d) only
3. (b), (c), (d) and (e) only
4. (a), (b), (c) and (d) only
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn old trees the greater part of secondary xylem is dark brown and resistant to insect attack due to :
| a. | secretion of secondary metabolites and their deposition in the lumen of vessels. |
| b. | deposition of organic compounds like tannins and resins in the central layers of stem. |
| c. | deposition of suberin and aromatic substances in the outer layer of stem. |
| d. | deposition of tannins, gum, resin and aromatic substances in the peripheral layers of stem. |
| e. | presence of parenchyma cells, functionally active xylem elements and essential oils. |
Choose the correct answer from the options given below
1. (b) and (d) Only
2. (a) and (b) Only
3. (c) and (d) Only
4. (d) and (e) Only
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe anatomy of springwood shows some peculiar features. Identify the correct set of statements about springwood.
| a. | It is also called as the early wood. |
| b. | In spring season cambium produces xylem elements with narrow vessels. |
| c. | It is lighter in colour. |
| d. | The springwood along with autumn wood shows alternate concentric rings forming annual rings. |
| e. | It has lower density. |
Choose the correct answer from the options given below:
1. (c), (d) and (e) Only
2. (a), (b), (d) and (e) Only
3. (a), (c), (d) and (e)Only
4. (a), (b) and (d) Only
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAxillary buds are derived from the activity of :
1. Lateral meristem
2. Secondary meristem
3. Apical meristem
4. Intercalary meristem
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