Phloem
Phloem
Tissues are the group of cells that perform a particular function. Phloem is a type of permanent tissue.
Phloem:
Phloem too is a complex tissue made up of four types of cells, or elements— sieve tubes, companion cells, phloem fibres and phloem parenchyma. It is not necessary for the phloem to contain all four types of cells. Phloem cells are living cells (except phloem fibres) which help transport food from leaves to the storage organs and growing regions of the plant.
Which of the following constituents is not found in the phloem? | |||
| Right Option : B | |||
| View Explanation | |||
What is the collection of "tube" cells that transport food through all vascular plants ? | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following are correct ? (a) The sieve tubes, companion cells, phloem fibres and phloem parenchyma are present in phloem . (b) Phloem Fibres are dead sclerenchyma cells. All plants do not have them. (c) Phloem Parenchyma Cells also form a part of the phloem. When present, they store food and help to conduct it .
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| Right Option : D | |||
| View Explanation | |||
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