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 |
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Vascular bundles in monocotyledons are considered closed because:

1. a bundle sheath surrounds each bundle
2. cambium is absent
3. there are no vessels with perforations
4. xylem is surrounded all around by phloem

Subtopic:  Vascular Tissue System |
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Closed vascular bundles lack:

1. Ground tissue

2. Conjuctive tissue

3. Cambium

4. Pith

Subtopic:  Vascular Tissue System |
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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 |
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Four radial V.B. are found in:
1.  Dicot root
2.  Monocot root
3.  Dicot stem
4.  Monocot stem

Subtopic:  Vascular Tissue System |
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