Pericycle

Q. During secondary growth of roots, the pericycle give rise to

1. lateral roots and vascular cambium
2. cortex and pith
3. xylem and phloem
4. epidermis and vascular bundles

Q. Match the columns I and II, and choose the correct combination from the options given.

	Column I		Column II
i	Apple	a	SCP
ii	Sugarcane	b	Meristem culture
iii	Pomato	c	Micropropagation
iv	$Spirulina$	d	Somatic hybrid

1. i ii iii iv
   a b c d
2. i ii iii iv
   b a c d
3. i ii iii iv
   c b a d
4. i ii iii iv
   c b d a

Q.

The tissue that provides strength and rigidity to the plant is ________.

Q. Vascular cambium in roots arises from

1. epiblema
2. pericycle
3. epidermis
4. endodermis

Q. Lateral roots are

1. stelar in origin
2. cortical in origin
3. stelar and endogenous in origin
4. cortical and exogenous in origin

Q.

Differentiate the following with the help of diagrams: Root hair and lateral root

Q. What is periderm? How does it take place?

Q. The central region of root apex containing less active cells is known as

1. Periblem
2. Quiescent region
3. Plerome
4. Dermatogen

Q.

Which type of simple permanent tissue has large air cavities?

Q. Pericycle is made up of Collenchyma tissue

1. True
2. False

3. The companion cells are specialised sclerenchymatous cells.

4. Phloem fibres are generally present in the primary phloem

Q. Lateral roots arise from the

1. endodermis
2. pericycle
3. pith
4. conjunctive tissue

Q. Lateral roots are

1. stelar in origin
2. cortical in origin
3. stelar and endogenous in origin
4. cortical and exogenous in origin

Q. Lateral roots are

1. stelar in origin
2. cortical in origin
3. stelar and endogenous in origin
4. cortical and exogenous in origin

Q. Short / Long answer type questions .
Write the short notes on the following
(a)Bulliform cells, (b) Velamen, (c) Periderm, (d) Ring porous wood

Q. Pericycle is made up of Collenchyma tissue

1. True
2. False

3. The companion cells are specialised sclerenchymatous cells.

4. Phloem fibres are generally present in the primary phloem

Q. Lateral roots arise from the

1. endodermis
2. pericycle
3. pith
4. conjunctive tissue

Q. Select the incorrect difference between the collenchyma & parenchyma tissue.

Collenchyma	Parenchyma
$\left(1\right)$ Mechanical tissue	Living tissue
$\left(2\right)$ Absent in monocots	Present in monocots
$\left(3\right)$ Intercellular spaces absent	Intercellular spaces may be present
$\left(4\right)$ Has thickenings of cellulose and lignin	Has thickening of cellulose and hemicellulose

1. A
2. B
3. C
4. D

Q. Vascular cambium in roots arises from

1. epidermis
2. pericycle
3. endodermis
4. epiblema

Q.

Adventitious root in a dicot stem originate from:

1. Radicle

2. Pericycle

3. Cortex

4. Endodermis

Q. The tissue formed of elongated parenchymatous cells is

1. Collenchyma tissues
2. Sclerenchyma tissues
3. Aerenchyma tissues
4. None of the above

Q.

Adventitious root in a dicot stem originate from:

1. Radicle

2. Pericycle

3. Cortex

4. Endodermis

Q.

Adventitious root in a dicot stem originate from:

1. Radicle

2. Pericycle

3. Cortex

4. Endodermis

Q. In monocots, root cap is formed by

1. Dermatogen
2. Calyptrogen
3. Wound cambium
4. Vascular cambium

Q. In the diagram of T.S. of stele of a dicot root, the different parts have been indicated by alphabets; choose the answer in which these alphabets correctly match with the parts they indicate.

1. A-Endodermis, B-Conjunctive tissue, C-Metaxylem, D-Protoxylem, E-Phloem, F-Pith
2. A-Endodermis, B-Pith, C-Protoxylem, D-Metaxylem, E-Protoxylem, F-Conjunctive tissue
3. A-Pericycle, B-Conjunctive tissue, C-Metaxylem, D-Protoxylem, E-Phloem
4. A-Endodermis, B-Conjunctive tissue, C-Protoxylem, D-Metaxylem, E-Phloem, F-Pith

Q. Lateral roots arise from the

1. endodermis
2. pith
3. pericycle
4. conjunctive tissue

Q. State whether the following are true or false.​

Sclerenchyma is a complex tissue. ​

Q. Which of the following statements are true regarding secondary growth in dicot root?
i. The cambial strip initially appears wavy in dicot roots.
ii. The cambium is formed by dedifferentiation of parenchymatous cells from pericycle and xylem parenchyma.
iii. The roots when transversely cut exhibit growth rings.
iv. The cambium produces secondary xylem towards inside and secondary phloem towards the outside.

1. i and ii
2. i, ii and iii
3. ii, iii and iv
4. i and iv