You are given a bone sample and, when you measure the amount of carbon and nitrogen in the sample you find that the sample contains 625 mg of C-14 (parent atom) and 1875 mg of N-14 (daughter atom). If Carbon-14 has a half-life of 5730 years, how old is the sample? “ Physical geology “

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

16. which of the following accurately describes a step within transcription? a. dna polymerase uses one strand of rna as a template to put together nucleotides. b. the dna strand is used as a template for which a complementary rna strand can be produced. c. the rna strand forms a template by which dna can be built. d. the rna strand is produced within the cytoplasm.

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic