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mbmifnbjaogmbohnplbglicoploehbha
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There is no consensus on the source of bryophytes. Some people think that they originated from green algae for the same reason: they contain the same photosynthesis pigment; the same storage starch; the sperm have two equal-length terminal flagella; spore germination The protoplast formed at the time is similar to the algae; the structure of the oocyst and sperm sac of the green algae can be compared with the ovum and sperm of the bryophyte.
Another view is that the bare ferns are degraded, the bare ferns appear in the Silurian, and the bryophytes appear in the middle of the Devonian, tens of millions of years later than the bare ferns. In terms of evolutionary order, they are likely to originate from the same ancestor. However, the above two views still lack sufficient evidence until 2017, and further research is needed in the future.