Examlex
The United States can use all its resources to produce 250 DVDs or 500 shoes.China can use all of its resources to produce 30 DVDs or 300 shoes.The opportunity cost of producing a DVD in the United States is
Dizygotic
Referring to twins that develop from two different eggs fertilized by two different sperm, making them genetically distinct, similar to siblings born at different times.
Identical Twins
Twins resulting from the splitting of a single fertilized egg, sharing the same genetic material and often having very similar appearances.
Fraternal Twins
Twins that develop from two different eggs fertilized by separate sperm cells, resulting in siblings that are genetically unique.
Epigenetic
Refers to the study of changes in organisms caused by modification of gene expression rather than alteration of the genetic code itself.
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