Anterior
发表于 2025-3-25 03:53:49
https://doi.org/10.1007/978-3-8350-9393-5diversification occurred in the Early to Middle Riphean (approximately 1500 to 1200 Ma ago), and might in some way be due to the appearance of eukaryotes. A sharp drop in stromatolite diversity occurs during the Vendian (675 to 570 Ma ago) and is probably due to the activity of metazoans. Two divers
平静生活
发表于 2025-3-25 08:59:35
https://doi.org/10.1007/978-3-8350-9393-5wer Cambrian. Only recently have other workers started to make use of the Soviet results, and many genera have not been reported outside the USSR and Mongolia, although Cambrian floras are known in Europe, North America, Australia and Antarctica. The outstanding problem which remains is of confident
cornucopia
发表于 2025-3-25 14:27:21
Calcification Processes in Algae and Cyanobacteria found to consist predominantly of polysaccharide, although no specific polymer seems to be associated with calcification..Two aspects of the mineralization merit special consideration: photosynthesis has long been considered the main driving force causing a depletion in aqueous carbon dioxide and a
SLUMP
发表于 2025-3-25 16:28:47
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套索
发表于 2025-3-25 23:03:22
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Frequency
发表于 2025-3-26 02:04:16
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减至最低
发表于 2025-3-26 06:51:18
Coralline Algae: Mineralization, Taxonomy, and Palaeoecologyllines as being a two-stage process; firstly, tangential and secondly radial calcite is deposited within the matrix of the cell walls. This internal calcification of cell walls is unique to the coralline algae and should be used to interpret early problematic red algae in which other characteristic
松果
发表于 2025-3-26 11:10:00
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Favorable
发表于 2025-3-26 12:52:43
Dasycladalean Algae of the Palaeozoic and Mesozoicn of published literature on classification and changing trends in the characters to be considered for this, and their evaluation. The absence of available dasycladalean evidence between the Upper Permian and Middle Trias is discussed, and suggestions made for possible future research to remedy this
Offset
发表于 2025-3-26 17:43:39
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