Gabriella Rakotomanga speaks on "Health care, food security and NGO development in Africa" at 4 p.m. in the Chemistry and Biological Sciences building, Room 216.

The UA Hispanic Alumni and Chicano/Hispano Student Affairs host a Fall Mixer at 5 p.m. in the courtyard of the Integrated Learning Center.

UApresents welcomes the Emerson String Quartet to Crowder Hall at 7:30 p.m. Tickets for the performance cost $50.

The UA School of Theatre Arts presents an etc· (educational theatre company) performance of "Step On a Crack" in the Theatre Arts building Directing Studio, Room 116. All tickets cost $3.50.