What was the universe like before the big bang

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.

Which type of bond forms between water moleculesstrong bondhydrogen bondcovalent bondpolar bond

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled