Assignment task: Submit a write-up that answers the following:
Q1. Define fertilization. Give its significance.
Q2. Differentiate an egg cell from a sperm cell. Describe them in terms of their anatomy and functions.
Q3. Define cleavage. Describe the stages of cleavage in terms of the manner and direction of the division.
Q4. List down the fate of the three germ layers, i.e. the different organs that will develop from each germ layer.