A) Xylem
B) Phloem
C) Cambium
D) Sieve tube cell
Correct Answer: A
Solution :
Xylem is responsible for conduction of water i.e., ascent of sap from roots to leaves. It was proved by Malpighi (1675) by girdling or ringing experiment. Cambium is a layer, usually regarded as one or two cells thick, or persistently meristemaric tissue, giving rise to secondary tissues, resulting in growth in diameter. Phloem is the food-conducting tissue, consisting of sieve tube, companion cells, parenchyma and fibers.
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