The oldest fossil evidence that geochemists have been able to find in deposits in Pilbara, Australia, and South Africa have been dated to 3.5 bya. In addition, organic compounds that may be the result of those produced by organisms have been dated, also in Greenland, to 3.8 bya.
Answer:
Phenotype: Brown Eyes, blond hair.
Genotype: a Aa, TT
Explanation:
Phenotypes are visible traits.
Genotypes are non-visible.
Answer:
C. a broad, well-supported explanation of related observations or events
Explanation:
A theory is a carefully thought-out explanation for observations of the natural world that has been constructed using the scientific method, and which brings together many facts and hypotheses.