Convergent evolution Intelligent Design

Convergence: Fish develop a variety of strategies in order to eat other fishes’ scales

From ScienceDaily: A small group of fishes — possibly the world’s cleverest carnivorous grazers — feeds on the scales of other fish in the tropics. The different species’ approach differs: some ram their blunt noses into the sides of other fish to prey upon sloughed-off scales, while others open their jaws to gargantuan widths to Read More…

Convergent evolution Intelligent Design

Spiders and ants independently developed baskets for carrying sand

From Nature: Desert spiders are master engineers A spider living in the Sahara Desert excavates its burrow by hauling out bundles of sand fastened with silken cords, while another carries sand balls in a ‘basket’ of its own bristles. … A similar basket evolved independently in desert ants, the authors note.More. See also: Evolution appears Read More…

Convergent evolution Intelligent Design

Convergent evolution: Researcher “amazed” by similarities between long-extinct marine reptiles and modern life forms that are NOT their descendants

From ScienceDaily: Researchers were surprised when sauropterygians with very different lifestyles had evolved inner ears that were very similar to those of some modern animals. “Sauropterygians are completely extinct and have no living descendants,” said Dr James Neenan, lead author of the study. “So I was amazed to see that nearshore species with limbs that Read More…

Convergent evolution Darwinism Evolution Intelligent Design

Stake in heart of school Darwinism lesson: Bilaterian nerve cords probably evolved many times

“This puts a stake in the heart of the idea of an ancestor with a central nerve cord,” says Greg Wray, an evolutionary developmental biologist at Duke University in Durham, North Carolina. “That opens up a lot of questions we don’t have answers to — like, if central nerve cords evolved independently in different lineages, Read More…

Convergent evolution Darwinism Intelligent Design

Convergent evolution: Independent origin of lizard toepads = evolution a “tinkerer”?

From ScienceDaily: Travis Hagey, Michigan State University evolutionary biologist, shows how different groups of lizards — geckos and anoles — took two completely different evolutionary paths to developing the beneficial trait of sticky toe pads. In a paper published in the journal Evolution, Hagey showed that anoles seemed to commit to a single type of Read More…

Convergent evolution Origin Of Life

Archaea vs. bacteria: Convergent evolution of molecular propeller

Abstract: The archaellum is the macromolecular machinery that Archaea use for propulsion or surface adhesion, enabling them to proliferate and invade new territories. The molecular composition of the archaellum and of the motor that drives it appears to be entirely distinct from that of the functionally equivalent bacterial flagellum and flagellar motor. Yet, the structure Read More…

Convergent evolution Intelligent Design speciation

Convergent evolution: Speciation in butterflies an unusually tough mess

Convergent evolution of mimetic species confounds classification. From ScienceDaily: The scientists discovered numerous cryptic species-two or more species erroneously classified as one species-as well as single species mistakenly described as two or three. Frequently, species discriminated with genetic data are each others’ closest relatives, but can be distinguished by stark genetic differences; this suggests a Read More…

Convergent evolution Evolution

Convergence: Wallabies do have placentas as well as milk that does placenta jobs

From Sara Reardon at Nature: Wallabies are kicking over scientific conventions surrounding mammalian placentas, the organ responsible for protecting and nourishing a developing fetus. A study finds that contrary to what scientists thought previously, mother tammar wallabies (Macropus eugenii) have both a functioning internal placenta and milk that performs some of the organ’s usual roles. Read More…

Cell biology Convergent evolution Intelligent Design

Lee Spetner: What challenges do convergent evolution and antibiotic resistance pose to Darwinian evolution?

First, from Casey Luskin in 2014 on Lee Spetner’s The Evolution Revolution here: Many ENV readers might have read, or at least heard of, a well-argued 1996 book by Lee Spetner, Not By Chance. Spetner, who holds a PhD in physics from MIT, has recently published a sequel titled The Evolution Revolution: Why Thinking People Read More…

Convergent evolution Darwinism Intelligent Design

Convergence or parallelism?: Kevin Padian at Nature on Jonathan Losos’ Improbable Destinies

Integrative biologist Kevin Padian reviews Improbable Destinies: Fate, Chance, and the Future of Evolution by Jonathan B. Losos at Nature. He likes it but with quite a few qualifications: Early in Jonathan Losos’s Improbable Destinies, the narrative goes off the rails. Losos sets up the problem of historical contingency in evolution by repeating the story that 66 Read More…

Convergent evolution Intelligent Design News

Does convergent evolution point to libraries of patterns in life forms?

From Anurag A. Agrawal and Editor: Judith L. Bronstein at The American Naturalist: Abstract: A charm of biology as a scientific discipline is the diversity of life. Although this diversity can make laws of biology challenging to discover, several repeated patterns and general principles govern evolutionary diversification. Convergent evolution, the independent evolution of similar phenotypes, Read More…

Convergent evolution News

Convergent evolution: “Emerging view” that evolution is predictable?

From ScienceDaily: Changes in a single color-vision gene demonstrate convergent evolutionary adaptations in widely separated species and across vastly different time scales, according to a study publishing on April 11 in the open access journal PLOS Biology by David Marques of the University of Victoria, British Columbia, and colleagues. The study, which combined genetic analysis Read More…

Convergent evolution Evolution extinction

Possible live Tasmanian wolf sightings?

From Mike Wehner at Yahoo News: Multiple reports of Tasmanian Tiger sightings are starting to flow in from everyday citizens in Australia. Several people have recently claimed they’ve spotted the animal… The marsupial Thylacine, believed extinct, is really much more like a wolf than a tiger, in appearance and ecological role. Australians have occasionally claimed Read More…