What are the bubbles composed of when pennies are in vinegar

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.

What is the difference between a meteoroid and a meteor?

What does the number 18.9984 represent in the image?