These organisms are not necessarily closely related. However, certain features unite them, while distinguishing them from the other major group of photosynthetic organisms: the land plants.

Based on such concerns, a group of researchers sought to describe the importance of all major groups of organisms in the global wildlife trade and called for more research on neglected groups. Their ...

Small organisms are also ancient and incredibly ... Plot the size distribution for nearly any major group of animals and you will find a strikingly positive skew: most species are much closer ...

The animal kingdom consists of more than 30 major body ... this tommotiid group called camenellans. Palaeontologists have thought that those shells were attached to an agile organism—crawling ...

What Darwin was bemoaning was the lack of “transitional” fossils – those with anatomical features intermediate between two major groups of organisms. At the time, such fossils were conceived ...

"This study demonstrates the dynamic nature of evolutionary change within major groups of organisms," said Melanie Hopkins, one of the co-authors on the study and an assistant curator in the ...