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If a fossil were to be discovered which was 3.7 billion years old this would tell us that life on Earth must have arisen
Reptiles
A class of cold-blooded, air-breathing vertebrates characterized by their skin covered in scales or hard plates, laying eggs, and typically having a three-chambered heart.
Warfarin
An anticoagulant drug used to prevent blood clots by inhibiting the synthesis of vitamin K-dependent clotting factors in the blood.
Hardy-Weinberg Principle
A foundational principle in population genetics stating that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of evolutionary influences.
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