In this task, you are given a paragraph, and your task is to construct a question from the given passage. Construct question in such a way that (i) it is well explained in the paragraph, (ii) the words may/may not be present in the paragraph, (iii) it should start with what/how/describe. Avoid creating a question that (i) is just relevant to one or two sentences, and (ii) not relevant to passage. 

[Q]: A plant dies. The remains of the plant are buried very fast in sediment. The soft parts of the plant decay. The hard parts of the plant are replaced with minerals. The sediment turns into rock. The rock erodes. The fossil appears on the surface of the ground. 
[A]: Describe the process of fossilization


[Q]: A nuclear reactor generates heat by nuclear fission. The heat created raises steam. The steam runs through turbines. The turbines generate electricity. The electricity leaves the station. 
[A]: How does a nuclear-powered power station generate electricity?


[Q]: Prophase, the chromosomes become visible. Centrioles separate to move to opposite poles. Metaphase, the chromosomes line up in the center. Anaphase, the chromatids separate. Are pulled apart. Telophase, the chromosomes gather at opposite poles. Two new nuclear membranes form. The cell membranes pinch. Divide into two individual cells. 
[A]:
Describe the steps in mitosis.