Which one among the following is living and non-nucleated at maturity ?
[amp_mcq option1=”Sieve tubes” option2=”Companion cells” option3=”Collenchyma” option4=”Parenchyma” correct=”option1″]
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UPSC Geoscientist – 2024
Sieve tubes are component cells of the phloem, responsible for the transport of sugars. At functional maturity, sieve tube elements are living cells but have lost their nucleus, vacuole, and other major organelles. They rely on associated companion cells for metabolic support. Companion cells, collenchyma, and parenchyma are all living and nucleated at maturity.