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प्रश्न
What are the constituents of phloem?
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
Name types of simple tissues.
Fill in the blank by selecting suitable words from the list given below:
Parenchyma is composed of large ..............cell
Write true or false of the statement. Rewrite the false statement correctly.
Sclerenchyma cells are dead cells with no protoplasmic content.
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.
A simple living permanent tissue which is absent in roots is ______.
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?
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:
Aerenchyma
The following terms has some anatomical significance. What do these terms mean? Explain with the help of line diagrams.
Secondary wall
