Why dna must unzip before it can be copied.

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

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.