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Phloem

The dead elem...

Question

The dead element present in the phloem is

a. companion cells
b. phloem fibres
c. phloem parenchyma
d. sieve tubes

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Question 22
The dead element present in the phloem is

(a) companion cells
(b) phloem fibres
(c) phloem parenchyma
(d) sieve tubes

Q. Match the following.

A. Sieve tubes	1. Sclerenchymatous
B. Companion cells	2. Perforated end walls
C. Phloem parenchyma	3. Connected to sieve tubes
D. Phloem fibres	4. Dense cytoplasm

Which of the following is living but non-nucleated ? a) phloem cell b) sieve tube c) companion cell d) phloem parenchyma

Q. Read the following statements:

(i) The sieve tube elements and companion cells are connected by pit fields present between their common longitudinal walls.
(ii) Phloem parenchyma is made of elongated non-tapering cylindrical cells that have a scanty cytoplasm.
(iii) Phloem fibers are made of parenchymatous cells.
(iv) Companion cells help in maintaining the pressure gradient in the sieve tube.
(v) The phloem parenchyma stores food material and other substances like resins, latex, and mucilage.

How many of the given statements are correct?

Q. Consider the following statements
(a) Xylem transports water and minerals
(b) Gymnosperms lack sieve tubes and companion cells in phloem
(c) First formed primary xylem is called metaxylem
(d) Phloem fibres (bast fibres) are made of collenchyma
Of these statements

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