Cambium

Q.

How does secondary growth takes place in dicot stem?

Q.

Give a short note on the protective tissue in plants

Q.

What are the four tissue types in a plant?

Q. Grafting in monocots is rarely successful because

1. they do not have cambium.
2. they have open vascular bundles.
3. they have very thick woody stems.
4. they undergo secondary growth.

Q. Which type of meristem does ‘A’, ‘B’ and ‘C’ exhibit respectively?

1. Primary, Primary, Primary
2. Primary, Secondary, Primary
3. Primary, Secondary, Secondary
4. Primary, Primary, Secondary

Q.

The dividing tissue present between xylem and phloem of the stem in the plants is

1. Cork cambium

2. Apical meristem

3. Intercalary meristem

4. Vascular cambium

Q.

Lysigenous cavity is present in:

1. Stem of Helianthus

2. Root of Helianthus

3. Root of Zea mays

4. Stem of Zea mays

Q.

Survival of plants in terrestrial environment has been made possible by the presence of :

1. Intercalary meristem

2. Conducting tissue

3. Apical meristem

4. Parenchymatous tissue

Q.

Explain the process of secondary growth in stems of woody angiosperm with help of schematic diagrams. What is the significance?

Q. In monocot roots, which types of vascular bundles are found?

1. Radial with exarch xylem
2. Collateral, conjoint and closed
3. Bicollateral, conjoint and closed
4. Radial with endarch xylem

Q. Consider the following statements:
(i) Mostly lateral meristems originate from the promeristem
(ii) By the activity of intercalary meristem length of the leaves increases
(iii) Cells of meristematic tissues possess abundant reserve food

Which of the statement(s) is/are true?

1. (i) and (iii)
2. (ii) and (iii)
3. only (ii)
4. (i), (ii) and (iii)

Q. The distinct cavities (lacunae) found in a mature vascular bundle of maize stem are formed due to

1. Disruption of protoxylem as well as lysis of adjacent xylem parenchyma
2. Disruption of protoxylem alone
3. Lysis of xylem parenchyma
4. Dissolution of common wall between a few meta xylem elements and their consequent coalition

Q. Which of the meristem is responsible for secondary growth?

1. Apical
2. Lateral
3. Intercalary
4. Basal

Q. The vascular cambial ring of a dicot stem is

1. Primary in origin
2. Secondary in origin
3. Embryonic in origin
4. Tertiary in origin
5. Partly primary and partly secondary in origin

Q. The cambium located in between xylem and phloem in dicot stem is

1. Interfascicular
2. Both A and B
3. None of the above
4. Intrafascicular

Q.

Grafting is successful in dicots but not in monocots because the dicots have

1. vascular bundles arranged in a ring

2. cambium for secondary growth

3. vessesls with elements arranged end to end

4. cork cambim

Q. During the secondary growth in a dicotyledonous stem, the fusiform initials of vascular cambium give rise to

1. Secondary xylem
2. Secondary phloem
3. Medullary ray
4. Both (a) and (b)

Q. Active divisions occur in the cells of:

1. Xylem
2. Phloem
3. Cambium
4. Collenchyma

Q.

Grafting is successful in dicots but not in monocots because the dicots have

1. cambium for secondary growth

2. vascular bundles arranged in a ring

3. vessesls with elements arranged end to end

4. cork cambim

Q. Closed vascular bundles lack

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

Q. Assertion :Secondary growth usually occurs in dicotyledonous stems Reason: The vascular cambium present between xylem and phloem possesses the ability to form secondary xylem and secondary phloem respectively

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Meristematic tissue in vascular bundle is

1. Procambium
2. Phellem
3. Interfascicular cambium
4. Fascicular cambium

Q.

Grafting is successful in dicots but not in monocots because the dicots have

1. vascular bundles arranged in a ring

2. cambium for secondary growth

3. vessesls with elements arranged end to end

4. cork cambim

Q. In T.S. Pheretima, the correct sequence of body wall layers from outer to inner side
(a) Circular muscles
(b) Parietal peritoneum
(c) Epidermis
(d) Cuticle
(e) Longitudinal muscles

1. c b e a d
2. d c e a b
3. d c a e b
4. d b a e c

Q. Give the biological/technical term for the permanently open structures seen on the bark of an old woody stem.

Q. When a meristematic tissue "cambium" is present inside a vascular bundle, the bundle is said to be

1. Conjoint
2. Open
3. Closed
4. Collateral

Q. Which of the following is true for the origin of epidermis and hypodermis

1. Epidermis from corpus and hypodermis from tunica
2. Epidermis from tunica and hypodermis from corpus
3. Both from tunica
4. Both from corpus

Q. A mass of dividing, undifferentiated cells in a tissue culture is called ______________.

1. A Shield
2. A Callus
3. An Embryoid
4. An Aggregate
5. A Plasmodium

Q. Cork cambium results in the formation of cork, which becomes impermeable to water due to the accumulation of

1. Resins
2. Suberin
3. Tannin
4. Lignin

Q.

Secondary xylem and phloem in dicot stem are produced by

1. vascular cambium
2. axillary meristem
3. phellogen
4. apical meristems