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

[EX Q]: Passage: The amount of material left over after a certain number of half-lives can be easily calculated. Answer: pheromone
[EX A]: What term is used to describe a chemical released by an animal that affects the behavior or physiology of animals of the same species?

[EX Q]: Passage: solid waste that remains after food is digested and is eliminated from the body through the anus. Answer: solid
[EX A]: What type of waste is eliminated from the body through the anus?

[EX Q]: Passage: Renal plasma flow equals the blood flow per minute times the hematocrit. If a person has a hematocrit of 45, then the renal plasma flow is 55 percent. 1050*0.55 = 578 mL plasma/min. Answer: hematocrit
[EX A]:
Renal plasma flow equals the blood flow per minute times the what?