In scientific literature some scientists speak of micro-evolution as small changes within a species but not necessarily leading to formation of new species. Macro-evolution describes changes above the species level, resulting in formation of new species. However, some biologists lump all changes together and consider macro-evolution to be simply the result of micro-evolution.
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About the Author
Dr Michael Jarvis obtained a PhD from Cape Town University in 1971, with zoology as major subject. He has written 36 scientific papers in reviewed scientific journals and 58 in popular science publications. Full CV available from E-mail: firstname.lastname@example.org and email@example.com