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Question
An example of monocots showing secondary growth in stem is
An example of monocots showing secondary growth in stem is
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Solution
The correct option is D Yucca
In monocotyledons normally vascular bundles are closed. The cambium being absent the secondary growth is absent but in some plants, like Dracaena and Yucca secondary growth takes place. Yucca belongs to a group of monocotyledons peculiar in having a cambial ring producing secondary tissues, which increase the size of the stem, as do the secondary tissues of dicots and gymnosperms. These secondary tissues are very characteristic of this group, since they differ in important features from those of gymnosperms and dicots.
In monocotyledons normally vascular bundles are closed. The cambium being absent the secondary growth is absent but in some plants, like Dracaena and Yucca secondary growth takes place.
Yucca belongs to a group of monocotyledons peculiar in having a cambial ring producing secondary tissues, which increase the size of the stem, as do the secondary tissues of dicots and gymnosperms. These secondary tissues are very characteristic of this group, since they differ in important features from those of gymnosperms and dicots.
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