Slug Harnesses Stolen Plant Genes, New Scientist Solar-Powered Sea
Young E. chlorotica fed with algae for two weeks, could survive for the rest of their year-long lives without eating, Rumpho found in earlier work.
But a mystery remained. Chloroplasts only contain enough DNA to encode about 10% of the proteins needed to keep themselves running. The other necessary genes are found in the algae's nuclear DNA. "So the question has always been, how do they continue to function in an animal cell missing all of these proteins," says Rumpho.
- Source: Solar-Powered Sea Slug Harnesses Stolen Plant Genes, Catherine Brahic, New Scientist,
- VIDEO - Watch a sea slug eat algae to nab some of its chloroplasts, and the genes that keep them functioning
200: The Needs Of The Many, Nature Darwin
Excerpts: Yet group selection - the idea that evolution can choose between groups, not just the individuals that make them up - has a higher profile today than at any time since its apparent banishment from mainstream evolutionary theory. And it gets better press, too. This is in part owing to the efforts of David Sloan Wilson, of
- Source: Darwin 200: The Needs Of The Many, Marek Kohn, DOI: 10.1038/456296a, Nature 456, 296-299,
200: Beneath The Surface, Nature Darwin
Excerpts: You might think that once evolution has found one way to get something done, it will stick with it. But similar physical forms can hide radically different wiring, (...).
Tunicates - also known as sea squirts - are humans' closest invertebrate cousins. They have tadpole-like larvae that closely resemble miniature vertebrate embryos and so were expected to build their bodies in the same way. But they don't. (..) It's as if you had found a car in which components of the engine were scattered all over the back seat - but the car still worked.
- Source: Darwin 200: Beneath The Surface, Tanguy Chouard, DOI: 10.1038/456300, Nature 456, 300-303,
Genetics: Quick Change, Nature
Excerpts: By mutating just two genes, researchers in
- Source: Genetics: Quick Change, DOI: 10.1038/456284a, Nature 456, 284,
Variation In Evolutionary Patterns Across The Geographic Range Of A Fossil Bivalve, Science
Excerpts: Within a fossil bivalve genus, evolution tended to occur as a random walk at the highest latitudes and to be in stasis mode in deep marine environments.
The fossil record is the only direct source of data for studying modes (patterns) and rates of morphological change over long periods of time. Determining modes and rates is important for understanding macroevolutionary processes, but just how modes and rates vary within a taxon, and why, remain largely unaddressed. We examined patterns of morphological change in the shell of the Mesozoic marine bivalve genus Buchia over its geographic and temporal range.
- Source: Variation In Evolutionary Patterns Across The Geographic Range Of A Fossil Bivalve, Melissa Grey, James W. Haggart, Paul L. Smith, DOI: 10.1126/science.1162046, Science: 1238-1241., 08/11/21