What is the name for a fossil that is common to a particular period of geologic time and serves as an indicator for that time? a. coprolite b. microfossil c. index fossil d. stromatolite

Accuracy in the translation of mrna into the sequence of amino acids in a polypeptide depends on specificity in which of the following? 1) binding of ribosomes to mrna 2) shape of the a and p sites of ribosomes 3) attachment of amino acids to trnas 4) bonding of the anticodon the codon and the attachment of amino acids to trnas