(a) Draw a diagram of the structure of a human ovum surrounded by corona radiata. Label the following parts: (i) Ovum (ii) Plasma Membrane (iii) Zona Pellucida (b) State the function of Zona Pellucida.

a) The given diagram shows the labelled sketch of human ovum showing corona radiata.
b) Zona pellucida forms the protective layer of oocyte and embryo during development. It is responsible for regulation of interaction between ovulated egg and free floating sperm