What are E. coli bacteria? Cell biology
E. coli bacterium under a microscope Where do E. coli bacteria live? E. coli are a very common kind of prokaryote cell that lives mainly inside mammals and birds, including [...]
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What are intestines? Evolution and Digestion
Whale intestines (from Medicine Chest) When did intestines evolve? The first animals to have anything like an intestine evolved around 548 million years ago. These were roundworms, just a few [...]
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Digestive System – Biology and Evolution
Digestive system: A hydra eating: the mouth is where all the tentacles come together,near the center of the picture.The hydra is eating the round bug in its stomach. Before digestive [...]
