Question

1. What are the components of phloem?​

Answer 1

Answer:

Phloem, also called bast, tissues in plants that conduct foods made in the leaves to all other parts of the plant. Phloem is composed of various specialized cells called sieve tubes, companion cells, phloem fibres, and phloem parenchyma cells. Primary phloem is formed by the apical meristems (zones of new cell production) of root and shoot tips; it may be either protophloem, the cells of which are matured before elongation (during growth) of the area in which it lies, or metaphloem, the cells of which mature after elongation. Sieve tubes of protophloem are unable to stretch with the elongating tissues and are torn and destroyed as the plant ages. The other cell types in the phloem may be converted to fibres. The later maturing metaphloem is not destroyed and may function during the rest of the plant’s life in plants such as palms but is replaced by secondary phloem in plants that have a cambium.

Explanation:

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Answer 2

Answer:

☑️ The different components of phloem include :

• Sieve tubes
• Companion cells
• Phloem parenchyma and
• Phloem fibres.

➡️ Sieve tubes: Transport sugars and nutrients up and down the plants in sieve cells.

➡️ Companion cells: Controls the activity of sieve tube.

➡️ Phloem parenchyma: Provides mechanical strength to the plant.

➡️ Phloem fibres: Stores compound such as starch.

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