Given a scientific passage and an answer, generate a question for the given answer.
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Question: Passage: Matter can be classified as transparent, translucent, or opaque depending on how it interacts with light. Answer: opaque

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

Question: Passage: Cloning is the process of creating an exact genetic replica of an organism. The clone's DNA is exactly the same as the parent's DNA. Bacteria and other single-celled organisms have long been able to clone themselves through asexual reproduction. Plants can also reproduce asexually. In animals, however, cloning does not happen naturally. In 1997, that all changed when a sheep named Dolly was the first large mammal ever to be successfully cloned. Other animals can now also be cloned in a laboratory. Answer: cloning

Answer: What is the process of creating an exact genetic replica of an organism called?

Question: Passage: Gymnosperms are seed plants that produce naked seeds in cones. There are about 1000 species of gymnosperms. Conifers are the most common group of gymnosperms. The spruce tree in Figure below is an example of a conifer. Answer: gymnosperms

Answer:
What are seeds plants that produce naked seeds in cones called?