Because are so small, they are not counted in the mass of an atom. a. electrons b. neutrons c. protons

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.

For this question look at the hydropic diagram water that is heated by the sun evaporates. select the number that represents it.

If an organ has six haploid chromosomes,how many chromosomes are present. 6 12