Cells possess three basic types of rna: 1. messenger rna (mrna); 2. ribosomal rna (rrna); 3. transfer rna (trna)

What is the main reason that attitudes are more often revealed in spoken rather than written language? a. in writing, we try to put the "best face" on what we write. b. we speak far more often than we write. c. in writing, we can more easily conceal our attitudes. d. in spoken language, we are often careless in our use of words.

Nucleic acids offer variability because they contain alternate forms of genes called .

All phases of matter may have a fixed mass