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

[EX Q]: Passage: The haploid gametophyte produces the gametes, or sperm and egg, by mitosis. Remember, gametes are haploid, having one set of chromosomes. Answer: mitosis
[EX A]: By what process does the haploid gametophyte produce the gametes?

[EX Q]: Passage: Imagine walking in the forest in Figure below . The towering trees have been growing here for hundreds of years. It may seem as though the forest has been there forever. But no ecosystem is truly static. The numbers and types of species in most ecosystems change to some degree through time. This is called ecological succession. Important cases of ecological succession are primary succession and secondary succession. Answer: ecological succession
[EX A]: The numbers and types of species in most ecosystems change to some degree through time and this is called?

[EX Q]: Passage: Several common human diseases are caused by fungi. They include ringworm and athlete's foot, both shown in Figure below . Ringworm isn't caused by a worm. It's a skin infection by a fungus that leads to a ring-shaped rash. The rash may occur on the head, neck, trunk, arms, or legs. Athlete's foot is caused by the same fungus as ringworm. But in athlete's foot, the fungus infects the skin between the toes. Athlete's foot is the second most common skin disease in the U. S. Answer: fungi
[EX A]:
Ringworm and athlete's foot are common human diseases caused by types of what?