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

Example Input: Passage: Mollusks live in most terrestrial, freshwater, and marine habitats. However, the majority of species live in the ocean. They can be found in both shallow and deep water and from tropical to polar latitudes. They have a variety of ways of getting food. Some are free-living heterotrophs. Others are internal parasites. Mollusks are also eaten by many other organisms, including humans. Answer: ocean
Example Output: Where do the majority of species live?

Example Input: Passage: Cloud types include cirrus, stratus, and cumulus. Answer: clouds
Example Output: Cirrus, stratus, and cumulus are types of what?

Example Input: Passage: Many cancerous cells are the products of normal cells that have lost the ability to regulate the cell cycle. The genes that encode the proteins involved in cell cycle regulation have mutations. One category of genes, called oncogenes, accelerate the cell cycle. Some cancers can be inherited, such as breast cancer (due to mutations in the BRCA1 and BRCA2 genes). Approximately five to ten percent of cancers are entirely hereditary. Other cancers are triggered by an environmental stimulus, such as through the relationship between tobacco smoke and lung cancer, or ultraviolet radiation and skin cancer. Answer: cancerous cells
Example Output:
What type of cells are often the product of normal cells that have lost the ability to regulate the cell cycle?