plz hep p8 points if u do the table below shows the half-life of an element:
half-life data
element half-life
carbon-14 5,730 years
scientists have found that the carbon-14 content of an unknown prehistoric sample was reduced to one-half. what best describes the identity of the sample?
an organism that died more than 10,000 years ago
a rock that formed more than 10,000 years ago
an organism that died 5,730 years ago
a rock that formed 5,730 years ago

The genetic code is essentially the same for all organisms. based on this information, one can logically assume which of the following statements to be correct? a. dna was the first genetic material. b. the same codons in different organisms translate into the different amino acids. c. different organisms have different numbers of different types of amino acids. d. a gene from an organism can theoretically be expressed by any other organism. e. all organisms have experienced convergent evolution.