Examlex
Which of these compounds cannot be used to prepare the corresponding Grignard reagent?
Zygote
The initial cell formed when a sperm cell fertilizes an egg cell, representing the earliest stage of embryonic development.
Implantation
The process by which a fertilized egg attaches itself to the lining of the uterus, beginning the pregnancy.
Blastocyst
An early stage of embryonic development that consists of a sphere of cells surrounding a fluid-filled cavity and a cluster of cells called the inner cell mass.
Trimester
One of the three approximately three-month periods into which pregnancy is divided.
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