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

Ex Input:
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

Ex Output:
Which region of dna consists of one or more genes that encode the proteins needed for a specific function?

Ex Input:
Passage: The rock of the mantle is mostly peridotite. Peridotite is formed of crystals of olivine (green) and pyroxene (black). Answer: peridotite

Ex Output:
The rock of the mantle is mostly what?

Ex Input:
Passage: No, not all animals have two parents. Sometimes animals can be made from just one parent. This Komodo dragon, for example, only has a mother and reproduces by parthenogenesis. Asexual reproduction is the process of creating offspring from just one parent. Answer: asexual reproduction

Ex Output:
Parthenogenis in komodo dragons is an example of what kind of reproduction, whereby offspring are created from just one parent?