Periderm comprises of

(1)Phellem

(2)phellogen

(3)phelloderm

(4)All of these

The dead cells which are formed towards the epidermis by cork cambium are called as

(1)cork

(2)phellem

(3)phelloderm

(4)Both A and B

The chloroplast containing parenchymatous cells which are formed towards the innerside by cork cambium are called as

(1)secondary cortex

(2)phelloderm

(3)phellem

(4)Both A and B

Which one is true for phellogen

(1)thick layer cells

(2)narrow, thin walled and nearly rectangular cells

(3)gives rise to phellem and phelloderm

(4)All of the above

Incorrect match is

(1)Phellogen  = cork cambium

(2)Phellem = Cork

(3)Phelloderm=cortex

(4)Phelloderm=Secondary cortex

In plants the replacement of the outer cortical and epidermal layers when they are broken are because of the

(1)Cork cambium

(2)vascular cambium

(3)Phellogen

(4)Both A and C

The cork is impervious to ______due to __________deposition in the cell wall.

(1)water, suberin

(2)water, lignin

(3)water, wax

(4)water, cellulose

Bark non-technically refers to tissues which lies

(1)exterior to vascular cambium

(2)exterior to cork cambium

(3)exterior to primary phloem

(4)All of the above

How many of the followings constitute the bark?

( secondary phloem, secondary cortex, cork cambium, complimentary cells, epidermis, periderm )

(1)6

(2)5

(3)4

(4)3

Which of the following is true for lenticels

(1)lens shaped opening

(2) occur in most woody trees

(3)permit exchange of gases

(4)All of the above