Generally monocots do not have second...

Generally monocots do not have secondary growth , but palms and bamboos have woody stems . Find the reason .

Text Solution

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Secondary growth does not occur in a monocot plant because of the absence of cambium in vascular bundle in between xylem and phloem .
Monocot stems , such as bamboo and palms do not have a vascular cambium and do not exhibit secondary growth by the production of concentric annual rings . Unlike bamboo and most monocots , palm stems can grow in girth by an increase in the number of parenchyma cells and vascular bundles .

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Assertion (A) : Monocots do not have secondary growth, but palms and bamboos have woody stems . Reason (R ) : Palms and bamboos have woody stems due to clusters of heavily lignified tracheids and fibers associated with the vascular bundles.

Both (A) and (R ) are wrong

(A) is wrong and (R ) is correct

(A) is correct and (R ) is wrong

(A) is correct and (R ) explanis (A)

Assertion (A) : Stem of the grass is soft and stem of the neem is hard. Reason (R ) : Grass is monocot, there is no secondary growth. So, its stem is soft whereas neem is dicot, and there is secondary growth so the stem is very hard and woody .

Both (A) and (R ) are wrond