facultative

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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

Ewart's important discovery that some of these lipochrome pigments occlude oxygen, while others do not, may have bearings on the facultative anaerobism of these organisms.

From Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" by Various