Effects of Slip and thermophoresis on Unsteady Flow and Heat Transfer of (MHD) Bioconvection of Nanofluids over a Stretching Sheet was investigated. Similarity transformations are employed to transform a set of nonlinear partial differential equations for momentum, heat and mass transfer, concentration and motile microorganism intoa set of nonlinear ordinary differential equations. These equations are solved using fourth order Runge-Kutta methods with a shooting technique. The effects of velocity slip, temperature slip, thermophoresis and grashof number are examined. While the velocity slip increases the velocity profile and decrease. As the temperature slip parameter increases the temperature profile decreases gradually while heat transfer rate increases.As the thermophoresis parameter increases the temperature profile increases while heat transfer rate initially decreases and then increases. The present numerical results are compared with available data and are found in an excellent agreement. Other results are presented in a table and in graphs.

Keywords : Unsteadiness, Numerical, Boundary layer, Slip, Bioconvection