母猪 发表于 2025-3-23 12:19:40
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https://doi.org/10.1007/978-3-319-72185-9alians. The polyclads are of particular interest because they provide a link between the regulative development of acoels and the determinative development of annelids and molluscs. Single blastomeres were deleted at the two- and four-cell stages by puncture through the eggshell membrane with tungstadroit 发表于 2025-3-24 15:24:49
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https://doi.org/10.1007/978-3-031-32346-1as well as secretions of shell glands (SGS), play roles in eggshell formation. As the oocytes pass through the portion of the female tract where the shell glands open, they are surronded by a two-layered envelope of SGS. This envelope prevents the dispersion of SFGs discharged after oviposition, andCerebrovascular 发表于 2025-3-25 00:01:04
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