Examlex
The _________ becomes part of the umbilical cord, produces formed elements of blood, and brings umbilical blood vessels to the placenta.
Genetic Variation
Variability in the genetic makeup among individuals within a population, which is essential for natural selection and evolution.
Subpopulations
Distinct groups within a larger population that may differ genetically and/or behaviorally, often due to geographical, ecological, or social barriers.
Molecular Clock
A technique in molecular evolution that uses mutation rates of biomolecules to deduce the time in prehistory when two or more life forms diverged.
Base Pair Substitutions
Mutations that occur when one nucleotide base pair is replaced by another pair, which can lead to changes in the protein produced.
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