STRUCTURAL ORGANISTION OF PLANTS AND ANIMALS
ANATOMY OF FLOWERING PLANTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Many physiological factors
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Many environmental factors
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both a and b
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Only photoperiod
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Detailed explanation-1: -Solution : The activity of cambium is under the control of environmental and physiological factors.
Detailed explanation-2: -Activity of Cambial Ring The cambial ring becomes active and starts cutting off new cells, both on the inner and the outer sides. The cells which are cut off towards the pith mature into secondary xylem. The cells which are cut off towards the periphery mature into secondary phloem.
Detailed explanation-3: -The vascular cambium is responsible for increasing the diameter of stems and roots and for forming woody tissue. The cork cambium produces some of the bark. In dicot stems, the vascular cambium initially differentiates from procambial cells within the vascular bundles (Fig.
Detailed explanation-4: -The cambium is generally more active on the inner side than the outer. As a result, the amount of secondary xylem produced is more than the secondary phloem and soon forms a compact mass. (v) The primary and secondary phloem get gradually crushed due to the continued formation and accumulation of secondary xylem.