Key Stage 3 (KS3) Biology Practice Test

The food store in ova (egg cells) serves the critical function of providing energy for the developing offspring once fertilization occurs. When an egg is fertilized by a sperm cell, it begins the process of cell division and development into an embryo. During the early stages of embryo development, especially before it can establish a connection with the mother for nourishment, the embryo relies on the nutrients stored in the egg cell.

This stored energy is vital for various processes, including cell division and growth, before the embryo can implant in the uterus and start receiving nutrients from the mother's blood supply. Hence, the food store is crucial in ensuring that the developing embryo has enough energy to begin its development and ultimately lead to a successful pregnancy.