Ulrich Kutschera (born 2 February 1955) is a former German professor of biology who works as an academic advisor at I-Cultiver, Inc. in San Francisco[1] and as a visiting scientist in Stanford/Palo Alto, California, US.

[8] Kutschera is an elected member of the Alexander von Humboldt Foundation, Bonn, Germany, and the European Society for Evolutionary Biology (ESEB).

In 2002, he became head of the Arbeitskreis (AK) Evolutionsbiologie (workgroup evolutionary biology) at the Verband Deutscher Biologen (vdbiol) [de][9] (association of German biologists), and from 2004 to 2007 was vice president.

[11] A statement accusing the gay community of child abuse and likening same-sex marriage to "state-sponsored pedophilia" drew widespread criticism and became subject of a trial for criminal slander,[12] in which he was acquitted on appeal.

[13] Kutschera has studied the mechanism of phytohormone-mediated cell expansion (epidermal growth-control theory of stem elongation; protein secretion hypothesis of auxin action; epiphytic methylobacteria as phytosymbionts in living-fossil plants).

He repeatedly asserted "overwhelming" scientific evidence that "men across all cultures prefer young, attractive, fertile, not particularly eloquent women, where he doesn't have to discuss much, and she cooks well and raises the children".

Dieter Schönecker wrote that "It is an intellectual catastrophe when contentious people like Ulrich Kutschera, Martin van Creveld, Jörg Baberowski or Rainer Wendt are no longer allowed to speak at a German university without the moral police from the 'imperium paternale' (Kant's term for paternal government) being sent out on patrol.

"[26] In a 2017 interview with a catholic online magazine, Kutschera predicted that same-sex marriage, which was at the time in the process of legalization in Germany, would lead to "government-sanctioned pedophilia" and "extensive child abuse".

In a Book Review, Karl J. Niklas wrote that this volume, which provides a comprehensive summary of our current knowledge on the physiology and biochemistry of plants "… should be of value to general readers interested in the philosophy of science.