Q. No.Identify the incorrect statement.
1. Sapwood is involved in conduction of water and minerals from root to leafs.
2. Sapwood is the innermost secondary xylem and is lighter in colour.
3. Due to deposition of tannins, resins, oils etc., heart wood is dark in colour.
4. Heart wood does not conduct water but gives mechanical support.
1. Sapwood is involved in conduction of water and minerals from root to leafs.
2. Sapwood is the innermost secondary xylem and is lighter in colour.
3. Due to deposition of tannins, resins, oils etc., heart wood is dark in colour.
4. Heart wood does not conduct water but gives mechanical support.
Which of the following statements about cork cambium is incorrect?
1. It forms a secondary cortex on its outside
2. It forms a part of periderm
3. It is responsible for the formation of lenticels
4. It is a couple of layers thick
Which of the statements given below is not true about the formation of annual rings in trees?
1. Annual rings are not prominent in the trees of temperate regions.
2. Annual rings are a combination of spring wood and autumn wood produced in a year.
3. Differential activity of cambium causes light and dark bands of tissue - early and late wood respectively.
4. Activity of cambium depends upon the variation in climate.
Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following :
1. Tyloses in vessels
2. Closure of stomata
3. Flaccidity of bulliform cells
4. Shrinkage of air spaces in spongy mesophyll
In the dicot root, the vascular cambium originates from :
1. Tissue located below the phloem bundles, a portion of pericycle tissue, above the protoxylem
2. Cortical region
3. Parenchyma between endodermis and pericycle
4. Intrafascicular and interfascicular tissue in a ring
The entrance of minerals into the vascular cylinder in the dicot root is regulated by:
| 1. | epidermis | 2. | pericycle |
| 3. | endodermis | 4. | root hairs |
Given below is the diagram of a stomatal apparatus. In which of the following, all the four parts labelled as A, B, C and D are correctly identified:
| A | B | C | D | |
| 1. | Guard cell | Stomatal aperture | Subsidiary Cell | Epidermal Cell |
| 2. | Epidermal Cell | Guard Cell | Stomatal aperture | Subsidiary cell |
| 3. | Epidermal Cell | Subsidiary Cell | Stomatal aperture | Guard Cell |
| 4. | Subsidiary Cell | Epidermal Cell | Guard Cell | Stomatal aperture |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
The cross-section shown in the given diagram shows the structure of a:
| 1. | Monocot stem | 2. | Monocot root |
| 3. | Dicot root | 4. | Dicot stem |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Match List I with List II
| List - I | List - II | ||
| (a) | Cells with active cell division capacity | (i) | Vascular tissues |
| (b) | Tissue having all cells similar in structure and function | (ii) | Meristematic tissue |
| (c) | Tissue having different types of cells | (iii) | Sclereids |
| (d) | Dead cells with highly thickened walls and narrow lumen | (iv) | Simple tissue |
Select the correct answer from the options given below.
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (ii) | (iii) | (iv) |
| 2. | (iii) | (ii) | (iv) | (i) |
| 3. | (ii) | (iv) | (i) | (iii) |
| 4. | (iv) | (iii) | (ii) | (i) |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Match List-I with List-II.
| List -I | List -I I | ||
| (a) | Lenticels | (i) | Phellogen |
| (b) | Cork cambium | (ii) | Suberin deposition |
| (c) | Secondary cortex | (iii) | Exchange of gases |
| (d) | Cork | (iv) | Phelloderm |
Choose the correct answer from the options given below.
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iii) | (iv) | (i) |
| 2. | (iv) | (ii) | (i) | (iii) |
| 3. | (iv) | (i) | (iii) | (ii) |
| 4. | (iii) | (i) | (iv) | (ii) |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
© 2024 GoodEd Technologies Pvt. Ltd.