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the answer's D. this explains it better than any ov my attempts:Can any one help me with this MCQ???It is Biology Paper- ON 2008P1 Q12
er: A complex question, in which candidates must first identify X as a xylem element and Y as a phloem
sieve tube. Testing their contents will show no reducing sugar or starch in the xylem or the phloem,
since sucrose (a non-reducing sugar) in the phloem will give a negative Benedict’s test unless
previously hydrolysed and then neutralised.