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

[Q]: Passage: Regulation of transcription in prokaryotes typically involves operons. An operon is a region of DNA that consists of one or more genes that encode the proteins needed for a specific function. The operon also includes a promoter and an operator. The operator is a region of the operon where regulatory proteins bind. It is located near the promoter and helps regulate transcription of the operon genes. Answer: operon
[A]: Which region of dna consists of one or more genes that encode the proteins needed for a specific function?

[Q]: Passage: Lipids are biochemical compounds such as fats and oils. Organisms use lipids to store energy. In addition to carbon and hydrogen, lipids contain oxygen. Answer: oils
[A]: Lipids are biochemical compounds such as fats and?

[Q]: Passage: Abscisic acid is misnamed because it was once believed to play a role in abscission (the dropping of leaves, fruits, and flowers), but we now know abscission is caused by ethylene. The actual role of abscisic acid is to close the stomata, the tiny openings in leaves that allow substances to enter and leave, and to maintain dormancy. When a plant is stressed due to lack of water, abscisic acid tells the stomata to close. This prevents water loss through the stomata. Answer: abscission
[A]:
What is the scientific term for the dropping of leaves, fruits, and flowers, which led to the naming of an acid thought to play a role in the process?