: a person who holds a particular office or position. Voters will have the chance to see the incumbent and her opponent in a series of three debates. Incumbents often have an advantage in elections. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples. incumbent /ÉªnËkÊmbÉnt/ adjective.incumbent. /ÉªnËkÊmbÉnt/. adjective. Learner's definition of INCUMBENT. always used before a noun formal. : holding an office or position. the incumbent president/mayor/senator.oters will have the chance to see the incumbent and her opponent in a series of three debates.
In other words, the Modern Synthesis is a theory about how evolution works at the level of genes, phenotypes, and populations whereas Darwinism was concerned mainly with organisms, speciation and individuals.
Total synthesis may be accomplished either via a linear or convergent approach. In a linear synthesisâoften adequate for simple structuresâseveral steps are performed one after another until the molecule is complete. The chemical compounds made in each step are called synthetic intermediates. For more complex molecules, a different approach may be preferable: convergent synthesis involves the individual preparation of several pieces (key intermediates), which are then combined to form the desired product.