Zones in a Root

Q. Choose the options which describe the features of region of meristematic activity:
I. Few millimetres above the root cap
II. Cells divide repeatedly
III. Cells are small and thin walled
IV. Cells undergo rapid elongation and enlargement
V. Root hairs develop from this region

1. I, II and III only
2. II, III and IV only
3. III, IV and V only
4. I, IV and V only

Q.

Cells are very small, thin-walled and with dense protoplasm. Which region of root is this?

1. region proximal to region of elongation

2. region where root hairs are present

3. region above root cap

4. region of root cap

Q.

The surface area of absorption is increased due to the presence of root hairs.

1. True
2. False

Q. Root hairs are present in the region of of a root.

1. active growth
2. elongation
3. maturation
4. root cap

Q.

Rearrange the following zones as seen in the root in vertical section and choose the correct option.

A. Root hair zone B. Zone of meristems

C. Root cap zone D. Zone of maturation

E.Zone of elongation

Codes

(a) C, B, E, A, D (b) A, B, C, D, E (c) D, E, A, C, B (d) E, D, C, B, A

Q.

Question 27.01:

1)What are the structural characteristics of meristematic cells near root tip?

2)What are the structural characteristics of the cells in the elongation zone of the root?

Q.

The root hairs are mainly produced in the

1. meristematic activity of root tip.

2. elongation of root tip.

3. maturation of root tip.

4. root with secondary growth.

Q. Root cap is not used in absorption of water due to

1. presence of root hairs
2. its presence in the elongation zone
3. absence of root hairs
4. none of the above

Q.

Diagram of a root-tip is given, wherein some parts are indicated by alphabets. Identify the option in which the parts are correctly matched.

1. Region of maturation, Region of elongation, Region of cell division, Root hair, root cap

2. Region of maturation, Region of elongation, Region of cell division, Rhizoids, Root pocket

3. Region of elongation, Region of maturation, Region of cell division, Root hair, Root cap

4. Region of secondary growth, Region of maturation, Region of elongation, Region of cell division, Root cap

Q.

Which of the following is NOT a sink?

1. roots

2. developing fruit

3. apical meristem

4. none of the above

Q.

Mucigel can inhibit the growth of competing plants.

1. True

2. False

Q.

Cells are very small, thin-walled and with dense protoplasm. Which region of root is this?

1. region proximal to region of elongation

2. region of root cap

3. region above root cap

4. region where root hairs are present

Q. Very fine, delicate and thread like structures called root hairs develop from which region of root?

1. Region of elongation
2. Region of meristematic activity
3. Regions of maturation
4. Root cap

Q. Root cap is not used in absorption of water due to

1. presence of root hairs
2. absence of root hairs
3. its presence in the elongation zone
4. none of the above

Q.

primary growth in plants is due to

1. Behind the apex

2. At, the region of cell division

3. At the region of root hair zone

4. At its tip

Q.

The root hairs are mainly produced in the

1. Meristematic zone

2. Zone of elongation

3. Zone of maturation

4. Region of secondary growth

Q. In the root apex, that meristem from which the root cap develops independently of all other initials of the apical meristem is known as _______________.

1. Calyptrogen
2. Casparian strip
3. Columella
4. Corpus

Q.

Diagram of a root-tip is given, wherein some parts are indicated by alphabets. Identify the option in which the parts are correctly matched.

1. Region of secondary growth, Region of maturation, Region of elongation, Region of cell division, Root cap

2. Region of elongation, Region of maturation, Region of cell division, Root hair, Root cap

3. Region of maturation, Region of elongation, Region of cell division, Root hair, Root cap

4. Region of maturation, Region of elongation, Region of cell division, Rhizoids, Root pocket

Q.

The lubricant secreted by the root cap is called __.

Q.

Root hairs develop from the region of:

1. Elongation

2. Root cap

3. Meristematic activity

4. Maturation

Q. Assertion :Quiescent centre is found in the centre of the root apex. Reason: It consists of actively dividing cells

1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
3. If the assertion is true but the reason is false
4. If both the assertion and reason are false

Q.

Which of the following form the growing part of the root?

1. Depending on the plant, either a or b

2. Both a and b

3. The root cap

4. The apical meristem

Q.

Root hairs develop from the region of:

1. Elongation

2. Meristematic activity

3. Root cap

4. Maturation

Q. Root hairs develop from the region of :

1. Elongation
2. Maturation
3. Root cap
4. Meristematic activity