The mechanical support to growing parts of plant such as young stem and petiole of leaf is provided by

(1) Collenchyma

(2) Parenchyma

(3) Bark

(4) Sieve tube

Lignified cell wall is characteristic feature of
1. Parenchyma
2. Collenchyma
3. Sclerenchyma
4. None

  _________ are commonly found in the fruit walls of nut.

Complex tissue in plants have

Tracheids, vessels, xylem fibres and xylem parenchyma are components of
1. Simple tissue
2. Xylem
3. Sclereids
4. Pith

Elongated cells with thick and lignified walls and tapering ends is a characteristic feature of
1. Xylem parenchyma
2. Xylem fibres
3. Tracheids
4. Vessels

Dead cell without protoplasm is ___________.
1. Sclerenchyma
2. Tracheids
3. Parenchyma
4. Both A and B

In flowering plants which of the following are main water transporting element
1. Tracheids
2. Vessels
3. Both A and B
4. None of the above

Central cavity is found in

The presence of _________ is characteristic feature of angiosperms.