Heartwood is
1.dark brown in color
2.contains organic compounds like tannin, resins, gums, oils
3.known as duramen
4.All of these

Which one is true for sapwood
1.It lies in the peripheral region of xylem
2.It does conduction of water and minerals
3.It is also called as alburnum
4.All of the above

Secondary growth in extra stelar region is due to

Cork cambium gives rise
1.cork
2.phelloderm
3.phellem
4.All of the above

Periderm comprises of
1.Phellem
2.phellogen
3.phelloderm
4.All of these

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

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