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Biology; Chemistry; Physics: Post your doubts here!

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PROBLEM HERE I THOUGHT ANSWER WAS D BUT ITS C. WHAT DO U PPL THINK. AM I CONFUSED IN STRUCTURES.
It's C definitely. Xylem conducts water and phloem sugars. The dark circles are xylem and there is cambium in between then phloem.
 
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http://papers.xtremepapers.com/CIE/Cambridge International O Level/Biology (5090)/5090_s10_qp_11.pdf
Why is 38 B option not correct?
every gene encodes for a specific protein that has it's distinctive function, I never heard this though.
I know what the ER says about option B, but sarey bacteria resistant ho jaen gey to phir? :confused:
Bacteria cannot be be insulin resistant. You 3 line is absolutely correct, and it is the little change in these genes that accord to different physical characteristics of human beings Option D is a better answer
 
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