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Earth and space

6. in the dna double helix, how are the two strands of dna held together? a. chemical bonds between base pairs hold the two strands of dna together. b. hydrogen bonds between the base pairs hold the two strands of dna together. c. hydrogen bonds between sugar groups and phosphate groups hold the two strands of dna together. d. chemical bonds between sugar groups and phosphate groups hold the two strands of dna together.

The buildup of sediments where a river empties into a slow-moving or nonmoving body of water is known as a/an

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?