instruction:
Given a scientific passage and an answer, generate a question for the given answer.
question:
Passage: After the film is developed, any unexposed silver bromide must be removed by a process called "fixing"; otherwise, the entire film would turn black with additional exposure to light. Although silver bromide is insoluble in water, it is soluble in a dilute solution of sodium thiosulfate (Na2S2O3; photographer's hypo) because of the formation of [Ag(S2O3)2]3 ions. Thus washing the film with thiosulfate solution dissolves unexposed silver bromide and leaves a. Answer: fixing
answer:
After the film is developed, any unexposed silver bromide must be removed by a process called what?

question:
Passage: Most plant cells have a large central vacuole . It can make up as much as 90 percent of a plant cell's total volume. The central vacuole is like a large storage container. It may store substances such as water, enzymes, and salts. It may have other roles as well. For example, the central vacuole helps stems and leaves hold their shape. It may also contain pigments that give flowers their colors. Answer: vacuole
answer:
Most plant cells have a large central what?

question:
Passage: The majority of amphibian species go through a larval stage that is very different from the adult form, as you can see from the frog in Figure below . The early larval, or tadpole , stage resembles a fish. It lacks legs and has a long tail, which it uses to swim. The tadpole also has gills to absorb oxygen from water. As the larva undergoes metamorphosis , it grows legs, loses its tail, and develops lungs. These changes prepare it for life on land as an adult frog. Answer: tadpole
answer:
What is another term for the early larval stage of a frog?