Primary xylem remains less or more intact towards the __________

(1) around the centre

(2) around the periphery

(3)outer to the pith

(4)Both A and C

Secondary growth occurs in

(1)dicot root and stem of angiosperms

(2)dicot root and stem of gymnosperms

(3)monocot roots

(4)Both 1 and 2

The secondary xylem is produced more because

(1)cambium is more active towards the inner side

(2)cambium is more active towards the outer side

(3)xylem is more important than phloem

(4)All of the above

The cells which are formed from vascular cambium towards the centre are____________and towards the periphery are _________________

(1)secondary xylem, secondary phloem

(2)bast, wood

(3)wood, bast

(4)Both A and C

Secondary growth is because of

1. vascular cambium

2. cork cambium

3. lateral meristem

4. All of the above

In dicot stem, at some places the cambium forms a narrow band of parenchyma which passes through the secondary xylem and secondary phloem in radial direction these are called _________.

The cambium is generally more active on the _________ side than the _________ side.

In dicot stem the cells of cambium present between primary xylem and primary phloem is the ___________.

In Dicots, secondary xylem and phloem tissues are formed because of

1. open vascular bundle

2. closed vascular bundle

3. Both 1. and 2.

4. semi closed vascular bundle

Which of the following true for apical meristem

1. responsible for primary growth

2. forms primary permanent tissue

3.  primary meristem

4. All of the above