From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in
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Explanation:
this phenomenon is first observed in the pteridophytes
like that of selaginella and salvia
but due in some bryophytes too mostly heterospecies..
got it hope it helps......
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young 'embryo' on the 'parent sporophyte' for some time is first observed in pteridophytes.
EXPLANATION:
The pteridophytes are the first set of organism in classification which consists of a vascular tissue and also the first set of plants that possess distinguished tissue for each purpose.
The sporophyte is formed by the "fusion of the microspore" and the megaspore in female reproductive organ, the formed zygote or the sporophyte is held there until they mature. This is to protect the growing sporophyte.
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