instruction:
Given a scientific passage and an answer, generate a question for the given answer.
question:
Passage: An important function of the circulatory system is transporting oxygen to cells. Answer: circulatory system
answer:
Which system transports oxygens to cells?

question:
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
answer:
The most common mode of asexual reproduction is through the formation of asexual these?

question:
Passage: In everyday conversation, to accelerate means to speed up. The accelerator in a car can in fact cause it to speed up. The greater the acceleration, the greater the change in velocity over a given time. The formal definition of acceleration is consistent with these notions, but more inclusive. Average Acceleration Average Acceleration is the rate at which velocity changes,. Answer: velocity
answer:
In scientific terms, average acceleration is the rate at which what changes?