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प्रश्न
What are the constituents of phloem?
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उत्तर
Phloem is a living tissue in vascular plants which conducts the soluble organic compounds synthesized during photosynthesis downward from the leaves.
Listed below are the constituents of phloem:
- Companion cells: It appear 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 pliability and 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.
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संबंधित प्रश्न
Fill in the blank by selecting suitable words from the list given below:
Cells are elongated and thick at the comers in...................... tissue.
Write true or false of the statement. Rewrite the false statement correctly.
Sclerenchyma cells are dead cells with no protoplasmic content.
Identify the odd word and explain why it is odd.
The following statement is wrong. Rewrite it correctly by changing either one or two words.
Chlorenchyma helps the plant to float in water.
State whether true or false. If false, correct the statement.
Parenchyma is a simple tissue.
Identify the INCORRECT statement.
A simple living permanent tissue which is absent in roots is ______.
While eating peach or pear it is usually seen that some stone like structures get entangled in the teeth, what are these stone like structures called?
Write the function of:
Collenchyma
Statement I: Parenchyma is living but collenchyma is dead tissue.
Statement II: Gymnosperms lack xylem vessels but presence of xylem vessels is the characteristic of angiosperms.
In the light of the above statements, choose the correct answer from the options given below:
