Editing List of biologists (section)

=== Am–As ===
*[[Bruce Ames]] (born 1928), American biochemist, inventor of the Ames test for mutagenicity (sometimes regarded as a test for carcinogenicity)
*[[John E. Amoore]] (1939–1998), British biochemist and zoologist, originator of the stereochemical theory of olfaction.
*[[José Alberto de Oliveira Anchieta]] (1832–1897), Portuguese naturalist who identified many new species of mammals, birds, amphibians and reptiles
*[[Mortimer Louis Anson]] (1901–1968), American biochemist and protein chemist who proposed that protein folding was reversible
*[[Jakob Johan Adolf Appellöf]] (1857–1921), Swedish marine zoologist<ref>Abbreviation in zoology: Appellöf</ref> who made important contributions to knowledge of cephalopods
*[[Agnes Robertson Arber]] (1879–1960), British plant morphologist<ref>Abbreviation in botany: A.Arber</ref> and anatomist, historian of botany and philosopher of biology
*[[Aristotle]] (384&nbsp;BC–322&nbsp;BC), Greek philosopher, sometimes regarded as the first biologist, he described hundreds of kinds of animals
*[[Emily Arnesen]] (1867–1928), Norwegian zoologist who worked on sponges
*[[Frances Arnold]] (born 1956), American biochemist and biochemical engineer, pioneer of the use of directed evolution to engineer enzymes. 
*[[Ruth Arnon]] (born 1933), Israeli biochemist, who works on anti-cancer and influenza vaccinations. She participated in developing the multiple sclerosis drug Copaxone.
*[[Peter Artedi]] (1705–1735), Swedish naturalist<ref>Abbreviations in zoology: Artedi, Arctaedius, Art.</ref> who developed the science of ichthyology
*[[Gilbert Ashwell]] (1916–2014), American biochemist, pioneer in the study of cell receptor
*[[Ana Aslan]] (1897–1988), Romanian biologist who studied arthritis and other aspects of aging
*[[William Astbury]] (1898–1961), British physicist, molecular biologist and X-ray crystallographer