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UrduGenetic analysis finds evidence suggesting that acoustic fat bodies in the heads of toothed whales were once the muscles and bone marrow of the jaw.
Tag: adaptive evolution
Scientists Pinpoint Growth of Brain’s Cerebellum as Key to Evolution of Bird Flight
Evolutionary biologists at Johns Hopkins Medicine report they have combined PET scans of modern pigeons along with studies of dinosaur fossils to help answer an enduring question in biology: How did the brains of birds evolve to enable them to fly?
How an unlikely amphibian survived its “Judgement Day”
An international team of researchers has uncovered “unprecedented” snake venom resistance in an unexpected species – the legless amphibian known as caecilians.
A Journey to the Origins of Multicellular Life: Long-Term Experimental Evolution in the Lab
Over 3,000 generations of laboratory evolution, Georgia Tech researchers watched as their model organism, “snowflake yeast,” began to adapt as multicellular individuals. In new research, the team shows how snowflake yeast evolved to be physically stronger and more than 20,000 times larger than their ancestor. Their study is the first major report on the ongoing Multicellularity Long-Term Evolution Experiment (MuLTEE), which the team hopes to run for decades.
Ancestral variation guides future environmental adaptations
The speed of environmental change is very challenging for wild organisms. When exposed to a new environment individual plants and animals can potentially adjust their biology to better cope with new pressures they are exposed to – this is known as phenotypic plasticity.
Diego bows to ancestral sabretoothed mammal
Morphological analysis of the discovered specimen’s tooth shapes helped to determine that the specimen was one of the earliest nimravids dating back 37 to 40 million years. Sabertoothed nimravids were early members of Carnivoramorpha, but dogs and cats did not evolve from them. Changes in ecosystems may have driven the evolution and rise of nimravids.