As viewed from a human perspective ... Take the evolution of sex, for instance. To make the move from asexual to sexual reproduction, nature took a system by which parent cells reproduced simply ...

Under microscopes, scientists found that giant single-cell organisms were able to vacuum up more food when they are stuck together. By Jack Tamisiea For a creature made up of only a single cell ...

The Multicellular Long-Term Evolution Experiment (MuLTEE) uses "snowflake" yeast (Saccharomyces cerevisiae) as a medium, evolving it from a single cell to increasingly complex multicellular organisms.