Examlex
Identify which of these types of sampling is used: random, stratified, systematic, cluster, convenience.
-A pollster uses a computer to generate 500 random numbers, then interviews the voters corresponding to those
Numbers.
Dinosaurs
A diverse group of reptiles of the clade Dinosauria that first appeared during the Mesozoic Era, known for their extensive diversity and dominance during the Jurassic and Cretaceous periods.
Paleozoic Era
A geological time period that lasted from about 541 to 252 million years ago, marked by significant evolutionary developments, including the rise of fish, amphibians, and reptiles.
Cenozoic Era
Span of geologic time extending from 66 mya to the present; marked by diversification of mammals, birds, insects, and flowering plants. Divided into Paleogene (66–23 mya), Neogene (23–2.6 mya), and Quaternary (2.6 mya to present) periods.
Chemical Evolution
The gradual process by which simple chemical compounds give rise to more complex molecules, eventually leading to the emergence of life.
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