Evolutionary Transitions to Multicellular Life: Principles by Iñaki Ruiz-Trillo, Aurora M. Nedelcu PDF

By Iñaki Ruiz-Trillo, Aurora M. Nedelcu

ISBN-10: 9401796416

ISBN-13: 9789401796415

ISBN-10: 9401796424

ISBN-13: 9789401796422

The e-book integrates our figuring out of the criteria and strategies underlying the evolution of multicellularity by way of delivering numerous complementary views (both theoretical and experimental) and utilizing examples from quite a few lineages within which multicellularity developed. contemporary years marked an elevated curiosity in figuring out how and why those transitions happened, and knowledge from a variety of fields are delivering new insights into the forces using different autonomous transitions to multicellular existence in addition to into the genetic and molecular foundation for the evolution of this phenotype. the final word target of this ebook is to facilitate the id of normal and unifying rules and mechanisms.

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Extra resources for Evolutionary Transitions to Multicellular Life: Principles and mechanisms

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0066245 Olive L, Blanton R (1980) Aerial sorocarp development by the aggregative ciliate, Sorogena stoianovitchae*. J Eukaryot Microbiol 27(3):293–299. 201100187). Bioessays 35(4):339–347. 201200143 Parfrey LW, Katz LA, Grant J, et al (2010) Broadly sampled multi-gene analyses yield a wellresolved eukaryotic tree of life. Syst Biol 59(5):518–533. 1093/sysbio/syq037 Parfrey LW, Lahr DJG, Katz LA, et al (2011) Estimating the timing of early eukaryotic diversification with multigene molecular clocks.

Multicellularity has emerged several times over the evolution of eukaryotes. Uncertainty about several regions of the eukaryotic tree makes it difficult to date the origin of multicellular groups. 3. Relaxed Molecular Clock (RMC) methods allow the estimation of unknown divergence dates from phylogenetic trees with fossil calibrations, accounting for variation in rate of sequence evolution among lineages. There are several ways to model this variation across phylogenetic trees. 4. The fossils used to calibrate RMC models add another level of uncertainty to the dating of the emergence of multicellular groups, as the phylogenetic placement and age of fossils are uncertain.

A Morphologies (colors) and morphological changes within a phylogeny depicting the emergence of the metazoans. Lineages with choanoflagellate-like morphologies (blue) split to produce crown choanoflagellates and the lineage that gave rise to living sponges and metazoans. At some point the ancestors of metazoans, which were biologically choanoflagellates, evolved obligate coloniality (1), which in turn gave rise to a differentiated multicellular organism with a sponge-like bodyplan (green, at 2).

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Evolutionary Transitions to Multicellular Life: Principles and mechanisms by Iñaki Ruiz-Trillo, Aurora M. Nedelcu

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