Which of the following appeared before the first cells evolved? A. protists
B. Eukaryotes
C. Archaea
D. protobionts

20 the compound al(nh3)2 has atoms of nitrogen.

What molecule contains an organisms genetic material, passed down from parents to their offspring

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.