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

Ex Input:
Passage: Sensory organs such as the eyes contain cells called sensory receptors that respond to particular sensory stimuli. Answer: sensory receptors

Ex Output:
Sensory organs that respond to particular sensory stimuli contain cells called what?

Ex Input:
Passage: Horner's syndrome is a condition that presents with changes in one eye, such as pupillary constriction and dropping of eyelids, as well as decreased sweating in the face. Why could a tumor in the thoracic cavity have an effect on these autonomic functions? 32. The cardiovascular center is responsible for regulating the heart and blood vessels through homeostatic mechanisms. What tone does each component of the cardiovascular system have? What connections does the cardiovascular center invoke to keep these two systems in their resting tone? 33. Why does smoking increase the risk of heart disease? Provide two reasons based on autonomic function. Why might topical, cosmetic application of atropine or scopolamine from the belladonna plant not cause fatal poisoning, as would occur with ingestion of the plant?. Answer: one eye

Ex Output:
Which part of the body shows does horner's syndrome affect?

Ex Input:
Passage: Humans could not live on Earth if it were not for protists. Why? Plant-like protists produce almost one-half of the oxygen on the planet through photosynthesis. Other protists decompose and recycle nutrients that humans need to live. All protists make up a huge part of the food chain. Answer: protists

Ex Output:
What produces almost one-half of the earth's oxygen through photosynthesis?