facultative

Example Sentences

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Some require fertilization to produce seeds, while others can also reproduce without fertilization, a process known as facultative agamospermy.

From Science Daily • Dec. 20, 2025

For the first time, scientists have induced facultative parthenogenesis, a form of asexual reproduction, in an animal that usually reproduces sexually.

From Salon • Jul. 28, 2023

Some species, termed facultative parthenogens, alternate between sexual and asexual reproduction.

From Scientific American • Jun. 9, 2023

Sketch a graph that predicts the distribution of aerobic, facultative anaerobic and obligatory anaerobic bacteria along the length of the entire intestine based on these parameters.

From Textbooks • Jun. 9, 2022

In Germany, Dr. Mensinga, the gynæcologist, is the most prominent advocate, on medical and hygienic grounds, of what he terms "facultative sterility," which he first put forward about 1889.

From Studies in the Psychology of Sex, Volume 6 Sex in Relation to Society by Ellis, Havelock