Phloem in the plants perform the function of
(a) conduction of food
(b) conduction of water
(c) providing support
(d) photosynthesis
Answers
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conduction of food.
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Option (a)conduction of food
➛Phloem is a type of complex permanent tissue which forms a conductive or vascular system in the plant body.
➛It conducts the prepared food from leaves to storage organs and growing regions.
➛It is composed of following four components sieve tubes, companion cells, phloem fibers and phloem parenchyma.
It is composed of:
• Sieve tube elements
• Companion cells
• Phloem parenchyma
• Phloem fibres
➙Sieve tube elements are tube-like elongated structures associated with companion cells. The end walls of sieve tube elements are perforated to form the sieve plate.
➙Sieve tube elements are living cells containing cytoplasm and nucleus. Companion cells are parenchymatous in nature.
➙They help in maintaining the pressure gradient in the sieve tube elements. Phloem parenchyma helps in the storage of food and is made up of long tapering cells, with a dense cytoplasm.
➙Phloem fibres are made up of elongated sclerenchymatous cells with thick cell walls.
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