Early metazoan life: divergence, environment and ecology
نویسندگان
چکیده
منابع مشابه
Early metazoan life: divergence, environment and ecology.
Recent molecular clock studies date the origin of Metazoa to 750-800 million years ago (Ma), roughly coinciding with evidence from geochemical proxies that oxygen levels rose from less than 0.1% present atmospheric level (PAL) to perhaps 1-3% PAL O2. A younger origin of Metazoa would require greatly increased substitution rates across many clades and many genes; while not impossible, this is le...
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ژورنال
عنوان ژورنال: Philosophical Transactions of the Royal Society B: Biological Sciences
سال: 2015
ISSN: 0962-8436,1471-2970
DOI: 10.1098/rstb.2015.0036