  Time evolution of modes of density contrast, in particular the growing modes,
dictate the structure formation in Universe. In this paper we explicitly show
how (spatial) Non-Commutativity (NC) can affect the behavior of the modes, that
is we compute NC corrected power law profiles of the density contrast modes. We
develop a generalized fluid model that lives in NC space. The dynamical
equations of fluid, namely the continuity and Euler equations receive NC
contributions. When mapped to comoving coordinates these generate the NC
extended versions of continuity and Friedmann equations for cosmology.
Introducing cosmological perturbations finally yield the NC corrected evolution
of density contrast modes. The construction of the NC fluid model from first
principles and development of the formal aspects of its Hamiltonian formulation
have been presented in the first part.

High Energy Physics - Theory;General Relativity and Quantum Cosmology