SCIENCE
BOTANY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -Assertion :The vascular cambium is absent in monocots. Reason: The monocots never show secondary growth.
Detailed explanation-2: -The monocot stem is composed of an epidermis, xylem and phloem (vascular bundles). The vascular bundles in a monocot stem are scattered throughout the origin of the stem underneath the epidermis. The scattered arrangement of the vascular bundles is a key characteristic that separates herbaceous dicots from monocots.
Detailed explanation-3: -Monocots do not have a vascular cambium, even though some of them, such as palms and the Joshua tree, exhibit secondary growth. Instead, they have a thickening meristem that produces secondary ground tissue.
Detailed explanation-4: -The arrangement of xylem and phloem is different in dicots than it is in monocots. The xylem is all located in the middle of the dicot root, and bundles of phloem are arranged around it, separated from it by vascular cambium.