*Question*
Q: In a smoke detector, a battery in the electric circuit creates what between the metal plates? Choices: - magnetism - hydrogen - cooling - voltage A:
**Answer**
voltage

*Question*
Q: Catalysts can greatly increase the rates of chemical what? Choices: - photosynthesis - decay - effects - reactions A:
**Answer**
reactions

*Question*
Q: What types of blood cells are required for aerobic respiration? Choices: - white blood cells - grey blood cells - large blood cells - red blood cells A:
**Answer**
red blood cells

*Question*
Q: What are two other terms for dizygotic twins, which make good study subjects because they share many environmental conditions, but only about half of their polymorphisms? Choices: - fractional - identical twins - interdependant twins - fraternal, non-identical A:
**Answer**
fraternal, non-identical