facultative

Example Sentences

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"Fascinatingly, we found that the obligately agamospermous Balanophora species were all island species -- and we speculate that more Balanophora species may be facultative, or even obligate, agamosperms."

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

Animals that exhibit facultative migration can choose to migrate or not.

From Textbooks • Jun. 9, 2022

Our thoughts are subjective reflections of His, modified by the contents of our facultative constitution and the peculiarities of our historic experience.

From The Destiny of the Soul A Critical History of the Doctrine of a Future Life by Alger, William Rounseville