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

Passage: The most common mode of asexual reproduction is through the formation of asexual spores, which are produced by one parent only (through mitosis) and are genetically identical to that parent (Figure 24.8). Spores allow fungi to expand their distribution and colonize new environments. They may be released from the parent thallus either outside or within a special reproductive sac called a sporangium. Answer: spores
The most common mode of asexual reproduction is through the formation of asexual these?

Passage: Matter can be classified as transparent, translucent, or opaque depending on how it interacts with light. Answer: opaque
Depending on how matter interacts with light, it can be classified as transparent, translucent, or what?

Passage: The mechanical advantage of a machine is the factor by which the machine changes the input force. It equals the ratio of the output force to the input force. A wheel and axle may either increase or decrease the input force, depending on whether the input force is applied to the axle or the wheel. Answer: mechanical advantage
What is indicated by the ratio of the output force to the input force in a machine?