Given below is the diagram of human ovum surrounded by a few sperms. Observe the diagram and answer the questions that follows : (i) Compare the fate of sperms P, Q and R shown in the diagram. (ii) Write the role of Zona pellucida in this process. (iii) Analyse the changes occurring in the ovum after the entry of sperm. (iv) How acrosome and middle piece of a human sperm are able to play an important role in human fertilization ?
The capacitation of sperms plays a significant role in the process of fertilisation in humans. Which of the following events are associated with the process of capacitation? I. Large quantity of Ca+2 ions enter the sperm to enhance the permeability of the acrosome. II. Antifertilisin reacts with the fertilisin protein. III. Membrane covering the sperm head and acrosome gets removed.
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