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Question
In which of the following is the offset type of a stem predominant?
In which of the following is the offset type of a stem predominant?
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Solution
The correct option is A Pistia
Offset type of stem is found in Pistia. An offset is stout, runner like horizontal stem. It is a prostate or sub-aerial weak stem, i.e., aerial stems that cannot stand upright without any support. Stem, here is soft and can bend without any difficulty. The stem has only one internode and spreads simply over ground surface. It is generally found in free floating hydrophytes like Eichhornia, Pistia etc. Leaves arise here in clusters in nodes. This type of stem also helps in vegetative reproduction. Oxalis is an example of runner. Runners are semi-aerial weak stems which also spread over ground.
Thus, the correct answer is option A.
Offset type of stem is found in Pistia. An offset is stout, runner like horizontal stem. It is a prostate or sub-aerial weak stem, i.e., aerial stems that cannot stand upright without any support. Stem, here is soft and can bend without any difficulty. The stem has only one internode and spreads simply over ground surface. It is generally found in free floating hydrophytes like Eichhornia, Pistia etc. Leaves arise here in clusters in nodes. This type of stem also helps in vegetative reproduction. Oxalis is an example of runner. Runners are semi-aerial weak stems which also spread over ground.
Thus, the correct answer is option A.
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