instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
A volcano chain is formed by subduction of oceanic crust beneath a continental or oceanic plate.
answer:
What kind of chain is formed by subduction of oceanic crust beneath a continental or oceanic plate?


question:
The nuclear envelope is a double-layered plasma membrane like the cell membrane, although without membrane proteins.
answer:
The nuclear envelope is a double-layered plasma membrane like the cell membrane, although without what?


question:
A(n) pathologist specializes in the laboratory detection of disease.
answer:

What type of doctor specializes in the laboratory detection of disease?