Q2 of 51 Page 30

Protoxylem is the first formed xylem. If the protoxylem lies next to phloem what kind of arrangement of xylem would you call it?

If the protoxylem lies next to phloem, this type of arrangement of xylem is known as Exarch.

Exarch arrangement is present in roots.


In exarch arrangement the protoxylem lies towards periphery and metaxylem lies towards the centre.


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What is the fate of primary xylem in a dicot root showing extensive secondary growth?

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Product of photosynthesis is transported from the leaves to various parts of the plants and stored in some cell before being utilised. What are the cells/ tissues that store them?

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What is the function of phloem parenchyma?

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What is present on the surface of the leaves which helps the plant prevent loss of water but is absent in roots?