Question

Match the following

$\begin{array}{cc}\text{Column A}& \text{Column B}\\ \text{(i) Sieve tubes}& \text{A. Living component of pholem}\\ \text{(ii) Companion cells}& \text{B. Translocation of organic substances through perforted walls}\\ \text{(iii) Pholem Fibre}& \text{C. Loading and unloading of the sugar into the sleve element}\\ \text{(iv) Phloem Parenchyma}& \text{D.Mechanical strength of the plant}\end{array}$

• A. (i) A, (ii) C, (iii) D, (iv) B
• B. (i) D, (ii) A, (iii) B, (iv) C
• C. (i) B, (ii) A, (iii) D, (iv) C
• D. (i) B, (ii) C, (iii) D, (iv) A

Answer 1

The correct option is D (i) B, (ii) C, (iii) D, (iv) A

$\begin{array}{cc}\text{Column A}& \text{Column B}\\ \text{(i) Sieve tubes}& \text{B. Translocation of organic substances through perforted walls}\\ \text{(ii) Companion cells}& \text{C. Loading and unloading of the sugar into the sleve element}\\ \text{(iii) Pholem Fibre}& \text{D.Mechanical strength of the plant}\\ \text{(iv) Phloem Parenchyma}& \text{A. Living component of pholem}\end{array}$


Phloem is a living tissue in vascular plants which conducts the soluble organic compounds synthesized during photosynthesis downwards from the leaves.

Companion cells – it appears to check the activity of the adjacent sieve element and participates in loading and unloading of the sugar into the sieve element

Sieve tubes – these elongated living cells, conveys carbohydrates, chiefly sucrose from leaves to roots and fruits

Phloem fibres – they are commercially useful as they possess great tensile strength

Phloem parenchyma – also known as transfer cells, they are found near the finest branches, ends of sieve tubes in leaf veinlets, functional here in conveying food