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प्रश्न
Draw a labelled diagram of (i) a xylem vessel, and (ii) a sieve tube (or phloem).
उत्तर
Structure of a xylem vessel:
Structure of sieve tube (or phloem):
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संबंधित प्रश्न
What are the components of the transport system in highly organised plants?
Which process in a plant is accomplished by utilising energy from ATP : transport of water and minerals or transport of food?
What is xylem tissue? Name the two kinds of cells in xylem tissue. State whether these cells are living or dead.
What do you mean by 'translocation' with respect to transport in plants?
Which plant tissue is involved in translocation : xylem or phloem?
Why is the transport of materials necessary in an organism (plant or animal)?
Which of the following carries substances upwards as well as downwards in a plant?
Water and dissolved minerals get into the root hair of a plant by a process called A and enter the conducting tissue B. The process C helps the water and dissolved minerals to move up through tissue B in roots and stem, and reach the leaves of a plant. In the leaves, food is made by a process D. This food is then transported to all the parts of a plant through tissue E. The process of distributing food made in the leaves to all the parts of the plants is called F.
(a) What are (i) A (ii) B (iii) C (iv) D (v) E, and (vi) F?
(b) Which tissue is made up of living cells: B or E?
(c) Which tissue, B or E, contains sieve tubes?
(d) Which tissue, B or E, contains tracheids?
Which of the following is the sink end of the plant?
Explain mechanism of sugar transport through phloem.
