He is the main organizer of this event.

The parenchyma of this plant plays a role in photosynthesis and storage.

The meristem of this plant is very active.

I love histology classes.

He launched a new organization project.

We need to organize a new project.

He was terrified of living in a police state.

The head of the police station explained the details of the incident to the press.

I went to the police station yesterday.

Police dogs are very effective in tracking criminals.