REPRODUCTION
SEXUAL REPRODUCTION IN FLOWERING PLANTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Xylem vessels and tracheids are living tissue and contain lignin
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Xylem vessels and tracheids are dead tissue and contain lignin
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Phloem tissue contains lignin and is living tissue
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Phloem tissue does not contain lignin and is dead at maturity
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Phloem tissue does not contain lignin and is living tissue
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Detailed explanation-1: -Lignin is also present in phloem, but is present in low amounts as compared to xylem. Cork also contains lignin but the predominant material in cork is suberin. Parenchyma is a living cell, that’s why Lignin is absent in parenchyma.
Detailed explanation-2: -The lignin content also differed among the different tissues, accounting for 27.1% in cork, 38.4% in phloem and 23.6% in xylem.
Detailed explanation-3: -So, the correct answer is ‘Collenchyma’
Detailed explanation-4: -Detailed Solution. The correct answer is Phloem transports photosynthetic products. Phloem is a living tissue in vascular plants that conducts the soluble organic compounds synthesized downwards from the leaves during photosynthesis. Hence option 2 is correct.