The type of daring used to determine the Earth’s age was Radiometric Dating.
If a fish wants to stay buoyant in the water, it will use its swim bladder. The swim bladder is an internal gas-filled organ that contributes to the ability of bony fish to stay buoyant in the water.
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4) the evidence is that not every generation has it, it skips generations, and it gets passed down even though the parents didn't have it. there are carriers
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