Vascular Bundles

Q.

Vascular bundles in monocotyledons are considered closed because

1. there is no cambium

2. xylem is surrounded all around by phloem

3. there are no vessels with perforations

4. a bundle sheath surrounds each bundle

Q.

Monocot stem has definite number of vascular bundles

1. False

2. True

Q.

The central cylinder consisting of vascular tissue and pericycle is called __

Q.

Does the arrangement of vascular bundles differ in dicots and monocots? If yes, then which of the following statement is true when we consider their vascular tissue systems?

1. Yes, the xylem is exarch in dicots and endarch in monocots

2. No, the vascular bundles in both dicots and monocots are arranged in the same way.

3. The vascular bundles are arranged in circular pattern in dicots and monocot root. It is randomly dispersed in monocot stem.

4. Yes, the vascular bundles are enclosed by pericycle in dicots and are open in monocots.

Q.

The position of cambium ring at the time of its origin in a dicot root is:

1. Internal to phloem and external to xylem.

2. External to phloem and internal to xylem.

3. Completely outside xylem and phloem.

4. Completely inside xylem and phloem.

Q.

Grafting is not possible in monocots because they:

1. are herbaceous.

2. lack cambium.

3. have parallel venation.

4. have scattered vascular bundles.

Q. Closed vascular bundles lack

1. Ground tissue
2. Cambium
3. Conjunctive tissue
4. Pith

Q.

Which of the following is absent in closed vascular bundles?

1. Ground tissue

2. Conjunctive tissue

3. Cambium

4. Pith

Q. The stele is composed of

1. vascular bundle
2. pith and vascular bundle
3. pith and cortex
4. cortex and endodermis

Q.

The vascular bundles are maximum in

1. Root of maize.

2. Stem of maize.

3. Root of sun flower.

4. Stem of sun flower.