Four radial V.B. are found in:
1.  Dicot root
2.  Monocot root
3.  Dicot stem
4.  Monocot stem

Subtopic:  Vascular Tissue System |
 76%
From NCERT
AIPMT - 2002
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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
Subtopic:  Complex Tissue: Xylem |
 53%
From NCERT
AIPMT - 2002
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The main function of lenticel is:
1. Transpiration
2. Guttation
3. Gaseous exchange
4. Bleeding

Subtopic:  Activity of Cork Cambium |
 93%
From NCERT
AIPMT - 2002
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The periderm includes:
1.  Secondary phloem
2.  Cork
3.  Cambium
4.  All of these

Subtopic:  Activity of Cork Cambium |
From NCERT
AIPMT - 1998
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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)

Subtopic:  Activity of Cork Cambium |
 87%
From NCERT
NEET - 2021
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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
Subtopic:  Vascular Tissue System |
 80%
From NCERT
AIPMT - 2011
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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
Subtopic:  Epidermal Tissue System |
 82%
From NCERT
AIPMT - 2010
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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
Subtopic:  Activity of Cork Cambium |
 59%
From NCERT
NEET - 2020
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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

Subtopic:  Monocot Leaf |
 84%
From NCERT
NEET - 2020
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Read the following statements about the vascular bundles:
 
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. all statements are correct
Subtopic:  Vascular Tissue System |
 55%
From NCERT
NEET - 2022
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