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What is a safe amount of alcohol to drink during pregnancy?
Evolution Timescales
The long periods over which evolutionary processes such as mutation, selection, and drift act, ranging from thousands to billions of years.
Natural Selection
The process by which organisms that are better adapted to their environment tend to survive and produce more offspring, a key mechanism of evolution.
Beak Size
The physical measurement of the length or depth of a bird's beak, which can influence its ability to feed and mate.
Fossil Record
The collection of all known fossils and their placement in chronological order, providing evidence about the history of life on Earth.
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