*Question*
Q: What kind of cells have positive cell potentials, and all the reduction reactions are reversible? Choices: - new cells - inhibited cells - neutral cells - galvanic cells A:
**Answer**
galvanic cells

*Question*
Q: What kind of solids are generally classified by the forces that hold their particles together and include ionic, metallic, covalent network, and molecular types? Choices: - distinct solids - helium solids - flat solids - crystalline solids A:
**Answer**
crystalline solids

*Question*
Q: The coordinated activities of the legume and the rhizobium bacteria depend on what between the partners? Choices: - electric signals - sight signals - fertilizer signals - chemical signals A:
**Answer**
chemical signals

*Question*
Q: What does photosynthesis change light energy into? Choices: - electrical energy - carbon energy - radiation energy - chemical energy A:
**Answer**
chemical energy