Summary: TEHRAN (FNA)- New findings challenge the long-standing idea that multi-celled animals evolved from a single-celled
ancestor resembling a modern sponge cell known as a choanocyte.
Studies of cell-to-cell differences also promise to reveal new information about single-celled
He specialises in researching the diversity of single-celled
organisms, or ciliates, and has received funding from the Natural Environment Research Council to set up a website dedicated to them.
Summary: TEHRAN (FNA)- Evidence of the single-celled
ancestors of animals, dating from the interval in Earth's history just before multicellular animals appeared, has been discovered in 570 million-year-old rocks from South China by researchers from the University of Bristol, the Swedish Museum of Natural History, the Paul Scherrer Institute and the Chinese Academy of Geological Sciences.
Since humankind missed the big moment the first time around, biologists studying the origins of complex life have coaxed single-celled
microbes to evolve multicellular forms capable of reproduction.
Over 600 million years ago, the single-celled
choanoflagellates (Latin for "bearing a collar and a whiptail") branched off from the same ancestor that gave rise to animals.
Algae and other single-celled
organisms power their movements with molecular motors.
The choanoflagellates have just one cell, but they're more closely related to people and other animals than are most single-celled
Life's long journey from single-celled
organisms to multicellular plants and animals may have depended upon the increasing presence of oxygen in the atmosphere, a new study suggests.
In those specimens, among partially digested chunks of wood, was a mixture of single-celled
organisms remarkably similar to the microbial melange that infests the guts of a primitive termite species still alive today.
amoebas that become stalled while dividing into two daughter cells summon help from fellow amoebas, according to a report in March 22 NATURE.
Among Muller's slides was an electron micrograph showing the interior of a eukaryotic cell, the kind of cell that makes up complex animals, including people, and many single-celled