Q. No.What is incorrect about Cycas?
1.
Its xylem has vessels
2.
It has circinate venation
3.
It does not have well organised female flower
4.
Its roots possess some blue-green algae
Identify the incorrect statement.
| 1. | Sapwood is involved in conduction of water and minerals from roots to leaves. |
| 2. | Sapwood is the innermost secondary xylem and is lighter in colour |
| 3. | Due to deposition of tannins, resins, oils etc., heartwood is dark in colour. |
| 4. | Heart wood does not conduct water but gives mechanical support. |
The transverse section of a plant shows following anatomical features:
| a. | Large number of scattered vascular bundles surrounded by bundle sheath. |
| b. | Large conspicuous parenchymatous ground tissue. |
| c. | Vascular bundles conjoint and closed. |
| d. | Phloem parenchyma absent. |
Identify the category of plant and its part :
1. Monocotyledonous root
2. Dicotyledonous stem
3. Dicotyledonous root
4. Monocotyledonous stem
Large, empty colorless cells of the adaxial epidermis along the veins of grass leaves are
| 1. | Lenticels |
| 2. | Guard cells |
| 3. | Bundle sheath cells |
| 4. | Bulliform cells |
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
Regeneration of damaged growing grass following grazing is largely due to:
| 1. | Lateral meristem | 2. | Apical meristem |
| 3. | Intercalary meristem | 4. | Secondary meristem |
In the dicot root, the vascular cambium originates from:
| 1. | Tissue located below the phloem bundles and a portion of pericycle tissue above protoxylem |
| 2. | Cortical region |
| 3. | Parenchyma between endodermis and pericycle |
| 4. | Intrafascicular and interfascicular tissue in a ring |
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 |
Which of the statements given below is not true about the formation of Annual Rings in trees?
| 1. | Annual rings are not prominent in 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 variation in climate. |
Phloem in gymnosperms lacks:
1. Both sieve tubes and companion cells
2. Albuminous cells and sieve cells
3. Sieve tubes only
4. Companion cells only
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