Examlex
Explain why a galaxy can collapse to a much smaller size than its dark matter halo.
Population
A group of individuals of the same species living and interacting within a particular area.
Gene Pool
Total of the alleles of all the individuals in a population.
Permian
The last geological period of the Paleozoic era, spanning from about 299 to 252 million years ago, preceding the Mesozoic era.
Mesozoic Layers
Stratified layers of rock that were formed during the Mesozoic Era, which spans from about 252 to 66 million years ago, encompassing the Triassic, Jurassic, and Cretaceous periods.
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