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

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

Passage: Each hemisphere of the cerebrum is divided into four parts, called lobes. The four lobes are the:. Answer: 4
How many lobes is each hemisphere of the cerebrum divided into?

Passage: Members of the genus Trypanosoma are flagellate protozoa that cause sleeping sickness , which is common in Africa. They also cause Chagas disease , which is common in South America. The parasites are spread by insect vectors. The vector for Chagas disease is shown in Figure below . Trypanosoma parasites enter a person's blood when the vector bites. Then they spread to other tissues and organs. The diseases may be fatal without medical treatment. Answer: sleeping sickness
Members of the genus trypanosoma are flagellate protozoa that cause what?