9) What is a major difference between prokaryotes and eukaryotes?
A) Prokaryotes have no nucleus.
B) All prokaryotes cause disease.
C) Eukaryotes contain more mitochondria.
D) Nucleic acids are founds only in eukaryotes.

The primary distinction between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not.                               So i would think that it is A

Explanation:

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answer

crater lake was formed when mount mazama produced a large eruption and collapsed to form a caldera, which then filled with water forming a lake.