Sentence examples for the missing link from inspiring English sources

"the missing link" is grammatically correct and can be used in written English.
It is typically used in two contexts: 1. A figurative sense, meaning a crucial element that is necessary to make a connection between two things: "The discovery of DNA was the missing link that connected the fields of biology and genetics." 2. A literal sense, meaning an organism that is the intermediary between two major evolutionary stages: "The Homo habilis fossil is believed to be the missing link between apes and humans."