Articles tagged with Metazoan Evolution
New 3D reconstructions of a key sensory organ in ctenophores show unexpected structural and functional complexity. The findings suggest that an elementary brain may have already appeared in our most ancient relatives, challenging the current understanding of nervous system evolution in animals.
Apusomonads display a clear avoidance response to blue light by asymmetrizing their posterior flagellum and contracting their cell body. This primitive mechanism provides clues to the evolution of high-speed flagellar movements in opisthokonts.
Researchers discover 555-million-year-old worm-like organism, Uncus dzaugisi, in Precambrian rocks of Nilpena Ediacara National Park. This tiny fossil represents the oldest confirmed member of Ecdysozoa and offers direct evidence of early ecdysozan life forms from the Precambrian.
A new study led by Arizona State University researcher Michael Lynch explores the substantial energy demands required to maintain and evolve multicellular life. Multicellular organisms require a tenfold increase in energy compared to protists, highlighting how respiration and metabolic processes are crucial for advanced life forms.
Researchers studied over 100 noctilionoid bat species, finding that different dietary types drove modifications in tooth number, size, shape, and position. For instance, fruit-eating bats have shorter jaws with reduced middle premolars, while nectar-feeders have longer jaws with room for more teeth.
A new study found evidence that multituberculates, an extinct group of mammals, likely reproduced in a placental-like manner. This discovery questions the long-held idea that marsupials were less advanced than placentals in terms of reproductive strategy.