Examlex
Dense material, like bone, is considered:
Chemicals
Substances with a distinct molecular composition that are used or produced in processes involving changes to molecules or atoms.
Identical Twins
Twins who originate from a single fertilized egg that splits and develops into two individuals with exactly the same genetic material.
Zygotes
The initial cell formed when a sperm fertilizes an egg, marking the beginning of human development.
Ovum
The female reproductive cell or egg that, when fertilized by a sperm, can develop into an embryo.
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