Large, empty colourless 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 |
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 |
Some vascular bundles are described as open because these:
1. | are not surrounded by pericycle |
2. | are surrounded by pericycle but no endodermis |
3. | are capable of producing secondary xylem and phloem |
4. | possess conjunctive tissue between xylem and phloem |
The periderm includes:
1. Secondary phloem
2. Cork
3. Cambium
4. All of these
The main function of lenticel is:
1. | Transpiration | 2. | Guttation |
3. | Gaseous exchange | 4. | Bleeding |
Vessels are found in:
1. | All angiosperms and some gymnosperm |
2. | Most of the angiosperm and few gymnosperms |
3. | All angiosperms, all gymnosperms, and some Pteridophyta |
4. | All pteridophyta |
Four radial V.B. are found in:
1. | Monocot root | 2. | Dicot root |
3. | Dicot stem | 4. | Monocot stem |
Match List-I with List-II.
List-I | List-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) |
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