Kidneys use energy to move molecules and ions in order to keep the blood chemically balanced. this process is an example of cells using energy to

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.

What is the inability of an individual or a society to achieve a minimum standard of living known as ?

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation