The first life forms to appear on Earth were unicellular, i.e., composed of a single cell, such as yeast or bacteria. Later, animals—multicellular organisms—evolved, developing from a single ...

In a groundbreaking study, scientists have created a mouse using stem cells powered by genes that originated from ancient ...

Archaea—one of the three primary domains of life alongside bacteria and eukaryotes—are often overlooked and sometimes ...

When subjected to physical pressure, archaea - ancient single-celled organisms - form multicellular structures.

Modern single-celled holozoa include the most basal living animals and the fossil discovered shows an ... into separate regions within a multicellular mass—existed in unicellular organisms a billion ...

Many species of multicellular organisms differ greatly from ... Evolution 62, 436–451 (2008). King, N. The unicellular ancestry of animal development. Developmental Cell 7, 313–325 (2004).

but because plants and animals very likely evolved from unicellular to multicellular organisms separately (Meyerowitz 2002). Therefore, stem cells probably evolved independently in both kingdoms ...

Based on the fluid dynamics of cooperative feeding by Stentor, a relatively giant unicellular organism, the report is published in Nature Physics. "We took a step back in evolution, to when ...

This trumpet-shaped organism is among the largest unicellular organisms, stretching as long as a sharpened pencil tip. But sometimes it has a hard time vacuuming up the swimming bacteria and ...