Aperson ate food x. food x was not affected by enzymes until it reached the duodenum. what was in food x?

How do you date a sample of rock that you suspect as being one of the earliest on earth

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).

Which characteristics are typical of a human population in the postindustrial stage?