Sclerenchymatous fibres are

1.	thick walled, elongated and pointed cells
2.	contains simple and bordered pits
3.	smallest  cells in plant body
4.	All of these

Which one is true regarding xylem?

The elements of xylem which does food storage is
1. tracheids
2. vessels
3. xylem parenchyma
4. xylem fibres

In angiosperms, the main water transporting elements are

The first formed primary xylem elements are__________and later formed is _____________
1. protoxylem , metaxylem
2. metaxylem , protoxylem
3. tracheids, vessels
4. Both B and C

The type of primary xylem when protoxylem lies towards the pith is known as
1. endarch
2. exarch
3. endoexarch
4. Both (1) and (3)

Phloem in angiosperms is composed of

Gymnosperms have

(1)albuminous cells

(2)sieve cells

(3)Both A and B

(4) comapanion cells

A mature sieve tube elements have

(1)large vacuole

(2)peripheral cytoplasm

(3)lack nucleus

(4)All of the above

Pressure gradient in the sieve tubes is maintained by