Evolution of the lithium surface abundances (A(Li) = log(), with X(Li) the lithium mass fraction), and carbon isotopic ratio as functions of effective temperature. Predictions are shown for 1.5 M_⊙ models at solar metallicity computed following standard prescriptions (dotted line) and including rotation-induced mixing as well as thermohaline instability (V_ZAMS = 110 km s^-1), from the ZAMS up to the TP-AGB phase (solid line). Evolutionary phases are indicated by a colour label: main sequence (black), red giant branch (green), He-burning phase (blue), and asymptotic giant branch (red). ZAMS (black triangle) and first dredge-up (start/end; full/open squares) are indicated.