facultative in a sentence

Examples

1. In modern Russian, use of the partitive case is often facultative.
2. Facultative heterochromatin is the result of genes that are RNAi.
3. It is also used in the wastewater industry for facultative microorganism respiration.
4. It was probably quadrupedal, but may have been a facultative biped.
5. Myiasis caused by a facultative ectoparasite is semispecific ( Stevens 2003 ).
6. This motile bacillus is a Gram negative, facultative anaerobe.
7. Facultative siblicide is seen in the closely related blue-footed booby.
8. Phoresy can be either obligate or facultative ( induced by environmental conditions ).
9. Any policy larger than this would require facultative reinsurance.
10. In 1954, the company created the first professional casualty facultative reinsurance department.