Scientists have found a new species of choanoflagellate. This close relative of animals forms sheets of cells that 'flip' inside-out in response to light, alternating between a cup-shaped feeding form and a ball-like swimming form. The organism could offer clues about animals' early evolution. Choanoflagellates inhabit the no-man's-land of protozoans -- creatures that are clearly not bacteria, but also don't qualify as complex multicellular life, like plants or animals. Each choanoflagellate…
