HEITI PAVES / SCIENCE PHOTO LIBRARY HEITI PAVES / SCIENCE PHOTO LIBRARY
C. elegans worm. Confocal laser scanning micrograph of a Caenorhabditis elegans worm. Neurons (nerve cells) are red and the digestive tract is green. C. elegans is a soil-dwelling hermaphrodite nematode worm and one of the most studied animals in biological and genetic research. A tendency to reproduce by self-fertilisation (resulting in identical offspring), along with the short time taken to reach maturity, make this tiny worm an ideal subject. Bacteria are yellow.
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