Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: In their processes of gene expression, archael cells seukaryotic similarties to both bacterial cells and which other type of cell.

Answer: In their processes of gene expression, archael cells show similarties to both bacterial cells and which other type of cell?

Question: Ectothermic vertebrates control body temperature to just a limited extent from the outside by changing behavior.

Answer: What type of vertebrates control body temperature to just a limited extent from the outside by changing behavior?

Question: A sudden flow of mud is called a(n) mudflow.

Answer:
What's it called when there's a sudden flow of mud?