Odd Organisms

Using a combination of anatomical, molecular, and fossil evidence, biologists have developed hypotheses for the evolution for chordate group...

The evolution of vascular tissue solved the terrestrial problems of supporting the plant body and obtaining water and minerals from the soil...

Green algae, which is named for their grass-green chloroplasts, include unicellular and colonial species as well as multicellular seaweeds. ...

Researchers recently discovered that many prokaryotes once classified as bacteria are actually more closely related to eukaryotes and belong...

Some of the diversity of prokaryotes is evident in their external features, including shape, cell walls, and projections such as flagella. T...

Protists are bewilderingly different. Oxygen-using prokaryotes established residence within other, larger cells. These endosymbionts evolved...

Animals are multicellular, heterotrophic eukaryotes that obtain nutrients by ingestion. Ingestion means eating food. Most animals are diploi...