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प्रश्न
Explain how sieve tubes manage to be living?
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उत्तर
Sieve tube elements of phloem tissue lack nucleus but still they manage to live. This is because they are connected to the companion cells of phloem tissue via numerous plasmodesmata. Both sieve tube elements and companion cells develop from the same meristematic cell and form a functional unit. Companion cells provide proteins, ATP, and other signalling molecules to the sieve tube member as it contains extra number of mitochondria and ribosomes
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संबंधित प्रश्न
What are the functions of the stomata?
Give two functions of collenchyma.
What is simple tissue? Classify and explain its different types with suitable diagram.
Identify the odd word and explain why it is odd.
Study the diagram given below and then answer the question that follows:
Where is this tissue likely to be found in the plant?
Differentiate between:
Parenchyma and collenchyma
Differentiate between:
Collenchyma and Sclerenchyma
Give the structure and function of the following:
Phloem
Name the tissue associated with the following:
Conduction of water in the plant body.
Name any two simple and two complex permanent tissues in plants.
