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Xylem and Phloem Tissues MCQs for Competitive Exams

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Xylem and Phloem Tissues MCQs for Competitive Exams

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Topic Notes: Xylem and Phloem Tissues

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Quick Overview

Xylem and Phloem Tissues MCQs in Biology are useful for candidates who need targeted practice for CSS, PMS, FPSC, PPSC, NTS, entry tests, and other competitive exams in Pakistan. This topic page is designed for quick revision, repeated practice, and exam-focused preparation.

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11
Which plant structures function as syncytes or tubes, facilitating efficient conduction due to the absence of cross walls or the presence of large perforations?
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12
What is the function of a perforation plate in plant anatomy?
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13
What term describes the bladder-like outgrowths from neighboring parenchyma cells that obstruct xylem vessels in woody trees?
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14
What is the specific term for the region of the pit membrane that surrounds the torus in bordered pits?
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15
According to the research conducted by Cheadle in 1963, in which plant organ did xylem vessels first appear evolutionarily?
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16
Which cells serve as the primary elements for water conduction in gymnosperms and pteridophytes?
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17
Through which specific cells does water absorbed by root hairs reach the xylem elements?
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18
Which of the following crop-disease pairings is incorrectly matched?
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19
What is the name of the highly refrangible substance that often surrounds the perforations in the sieve-plates of phloem tissue?
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20
Which type of xylem vessel is characterized by secondary wall thickenings that form transverse, interconnected bars?
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