The book 'Systema Naturae' was one of the major works of the Swedish botanist, zoologist and physician Carolus Linnaeus (1707-1778) who introduced the Linnaean taxonomy, that later came to be known as the binomial nomenclature. The first edition was published in 1735.
Haeckel coined the term "ecology".
Whittaker proposed the five-kingdom classification.
Robert Brown discovered the nucleus.