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

Ex Input:
Passage: Some molecules, such as proteins, are too large to pass through the plasma membrane, regardless of their concentration inside and outside the cell. Very large molecules cross the plasma membrane with a different sort of help, called vesicle transport . Vesicle transport requires energy, so it is also a form of active transport. There are two types of vesicle transport: endocytosis and exocytosis. Both types are shown in Figure below and described below. Answer: active transport

Ex Output:
What type of transport is vesicle transport considered to be?

Ex Input:
Passage: Landslides are the most dramatic, sudden, and dangerous types of mass wasting. Landslides are sudden falls of rock; by contrast, avalanches are sudden falls of snow. Answer: landslides

Ex Output:
What are the most dramatic, sudden, and dangerous types of mass wasting?

Ex Input:
Passage: Groundwater dissolves minerals and rocks into ions. Groundwater deposits those ions into different types of structures. Limestone caves are the best place to see these structures. Water erodes the cave and it has deposits structures like stalactites and stalagmites. The cave pictured here is Carlsbad Caverns in New Mexico. Answer: ions

Ex Output:
Groundwater dissolves minerals and rocks into what?