ScienceDaily: Biotechnology News |
| Last universal common ancestor more complex than previously thought Posted: 05 Oct 2011 08:21 AM PDT Scientists call it LUCA, the Last Universal Common Ancestor, but they don't know much about this great-grandparent of all living things. Many believe LUCA was little more than a crude assemblage of molecular parts, a chemical soup out of which evolution gradually constructed more complex forms. Some scientists still debate whether it was even a cell. New evidence suggests that LUCA was a sophisticated organism after all, with a complex structure recognizable as a cell, researchers report.  |
| Important discovery about heme, one of the key pigments of life Posted: 05 Oct 2011 08:02 AM PDT Researchers have discovered a new way in which nature makes heme - the component that gives blood its color and allows red blood cells to carry oxygen around the body.  |
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