Given a scientific passage and an answer, generate a question for the given answer.

[Q]: Passage: rates The rates at which reactants are consumed and products are formed during chemical reactions vary greatly. We can identify five factors that affect the rates of chemical reactions: the chemical nature of the reacting substances, the state of subdivision (one large lump versus many small particles) of the reactants, the temperature of the reactants, the concentration of the reactants, and the presence of a catalyst. Answer: catalyst
[A]: The presence of what, which acts as a trigger, affects the rate of chemical reaction?

[Q]: Passage: In sexually reproducing organisms, parents pass a copy of each type of chromosome to their offspring by producing gametes. When gametes are fertilized and form offspring, each has a unique combination of chromosomes and genes from both parents. The inherited gene combination determines the characteristics of the offspring. Answer: chromosome
[A]: In sexually reproducing organisms, parents pass a copy of each type of what to their offspring by producing gametes?

[Q]: Passage: Electron configurations are a shorthand method of indicating what subshells electrons occupy in atoms. Answer: atoms
[A]:
Electron configurations are a shorthand method of indicating what subshells electrons occupy in these?