Examlex
All specimens of a pure ______________ have identical properties and composition.
Mutations
Mutations are changes in the DNA sequence of an organism's genome, which can result in new phenotypes and contribute to genetic variation.
Lineages
Sequences of species descending from a common ancestor, often shown in phylogenetic trees to illustrate evolutionary relationships.
Ancient Cetacean
Refers to the early, now-extinct members of the order Cetacea, which includes whales, dolphins, and porpoises.
Modern Cetacean
Refers to contemporary species of whales, dolphins, and porpoises that are members of the order Cetacea, adapted to life in the aquatic environment.
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