After years of searching, he finally met his biological mother and learned that she was the source of the family's mitochondrial DNA and half of his DNA.

After years of searching, he finally met his biological parents at the airport.

After years of wondering why she looked different from the rest of the family, Maria finally decided to contact her biological parent.

International treaties were strengthened after evidence emerged that some states had researched biological warfare.

In the seminar, students compared different biological psychologies to understand how brain structures influence behavior.

The committee emphasized that sustainable development strategies must respect biological imperatives such as reproduction and energy balance.

Biological psychologists often collaborate with neuroscientists to explore how neural circuits influence behavior.

Farmers increasingly rely on biological controls to manage pests without chemicals.

Many researchers rejected biological determinism as an explanation for complex social behaviors.

Many sociobiologists argue that the biological imperative shapes social behaviors across species.