The correct order of the process that occurs when a sperm encounters an egg is the a. sperm reaches ovum, zona pellucida dissolves, zygote is formed, implantation occurs, and the embryo begins secreting hCG. b. zona pellucida dissolves, sperm reaches ovum, zygote is formed, implantation occurs, and the embryo begins secreting hCG. c. zona pellucida dissolves, sperm reaches ovum, zygote is formed, embryo begins secreting hCG, and implantation occurs. d. sperm reaches ovum, zygote is formed, implantation occurs, zona pellucida dissolves, and the embryo begins secreting hCG. e. sperm reaches ovum, zona pellucida dissolves, zygote is formed, embryo begins secreting hCG, and implantation occurs.
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