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

"Certain temperature conditions may foster all-female populations, which can be overcome through facultative parthenogenesis," he said.

From Salon • Jun. 10, 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

The greater number of the organisms are facultative anærobes and oxygen is not necessary. 32Again, koumiss put up in bottles on the first day is regularly shaken although air is excluded.

From The Bacillus of Long Life a manual of the preparation and souring of milk for dietary purposes, together with and historical account of the use of fermente by Douglas, Loudon