%0 Journal Article %T The Interplay between SF and AGN Activity, and its role in Galaxy Evolution %A Kim McAlpine %A Isabella Prandoni %A Matt Jarvis %A Nick Seymour %A Paolo Padovani %A Philip Best %A Chris Simpson %A Daria Guidetti %A Eric Murphy %A Minh Huynh %A Mattia Vaccari %A Sarah White %A Rob Beswick %A Jose Afonso %A Manuela Magliocchetti %A Marco Bondi %J Physics %D 2014 %I arXiv %X It has become apparent that active galactic nuclei (AGN) may have a significant impact on the growth and evolution of their host galaxies and vice versa but a detailed understanding of the interplay between these processes remains elusive. Deep radio surveys provide a powerful, obscuration-independent tool for measuring both star formation and AGN activity in high-redshift galaxies. Multiwavelength studies of deep radio fields show a composite population of star-forming galaxies and AGN, with the former dominating at the lowest flux densities (S$_{1.4\mathrm{GHz}}<$100~$\mu$Jy). The sensitivity and resolution of the SKA will allow us to identify, and separately trace, the total star formation in the bulges of individual high-redshift galaxies, the related nuclear activity and any star formation occurring on larger scales within a disc. We will therefore gain a detailed picture of the apparently simultaneous development of stellar populations and black holes in the redshift range where both star-formation and AGN activity peak (1$\leq$z$\leq$4). In this chapter we discuss the role of the SKA in studying the connection between AGN activity and galaxy evolution, and the most critical technical requirements for such of studies %U http://arxiv.org/abs/1412.5771v1