Differentiate between:

Asked by shrey17 | 7th May, 2009, 08:27: AM

Expert Answer:

  Xylem Phloem
1 It transports water and minerals from roots to aerial parts of the plant body. It transports food from leaves to other parts of the plant body.
2 It is made up of mainly dead elements. It is made up of mainly living cells.
3 Xylem is composed of tracheids, vessels, xylem parenchyma and xylem fibres. Phloem is composed of sieve tubes, companion cells, phloem parenchyma and phloem fibres.

 

  Collenchyma Sclerenchyma
1 This tissue is made up of living cells. This tissue is made up of dead cells
2 The cells show cytoplasm Its cells are empty
3 The cell walls are cellulosic, with uneven deposition at the corners. The cell walls are lignified with uniform thickening.
4 It shows wide cell lumen Cell lumen is narrow here.
5 Collenchyma provides mechanical support and elasticity to the plant body. Sclerenchyma provides mechanical support.
     

Answered by  | 10th May, 2009, 08:43: PM

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