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 |
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
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. Dicot root
2. Monocot root
3. Dicot stem
4. Monocot stem
Match List-I with List-II.
List -I | List-I |
(a)Lenticels (b)Cork cambium (c) Secondary cortex (d)Cork |
(i) Phellogen (ii) Suberin deposition (iii) Exchange of gases (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