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)

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

Which of the following is true for phloem parenchyma?

(1)made up of elongated, tapering cylindrical cells

(2)have dense cytoplasm and nucleus

(3)stores food material and resins, latex and mucilage

(4)All of the above

Which element of the phloem becomes dead at maturity

Metaphloem contains _________sieve tubes while protophloem contains____________ sieve tubes.

1. bigger, narrow

2. narrow, bigger

3. narrow, no

4. no, bigger

Epidermal tissue system consists of