How many reactants and products are present in a double-replacement reaction?

one reactant and two products

one reactant and one product

two reactants and two products

two reactants and one product

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 term best describes a community in which people work mostly in factories? a.agricultural. b.hunting and gathering. c.domesticated. industrial.

Cells must be in osmotic equilibrium with their surroundings environments because if they swell or shrink thier membranes will rupture