Q12 of 386 Page 169

Distinguish between xylem and phloem.

Differences between xylem and phloem:

Xylem	Phloem
It is composed of four types of elements: xylem vessels, tracheids, xylem parenchyma and xylem fibres.	It is composed of four types of elements: sieve tubes, companion cells, phloem parenchyma and phloem fibres.
It consists of mainly dead cells.	It consists of mainly living cells.
It conducts water and minerals.	It conducts food.

Give teo functions of collenchymas.

Write a short note on sclerenchyma.

Distinguish between tracheids and vessels.

Explain different types of elements present in phloem.