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

[Q]: Passage: The protist kingdom is sometimes called the "trash can" kingdom. It includes all eukaryotes that don't fit in one of the other three eukaryote kingdoms: Animalia, Plantae, or Fungi. There are thought to be between 60,000 and 200,000 protist species. Many have yet to be identified. The protist kingdom is very diverse, as shown in Figure below . Answer: trash can kingdom
[A]: What is the protist kingdom sometimes called as?

[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
[A]: The numbers and types of species in most ecosystems change to some degree through time and this is called?

[Q]: Passage: reproductive structure produced by a seed plant that contains an embryo and food supply enclosed within a hull. Answer: hull
[A]:
Where is the food supply and embryo stored in a seed?