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B. Problem - Development - Research - Engineering solution
Explanation:
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Answer:
Prokaryotic cells are much smaller than eukaryotic cells, have no nucleus, and lack organelles. All prokaryotic cells are encased by a cell wall. Many also have a capsule or slime layer made of polysaccharide. Prokaryotes often have appendages (protrusions) on their surface.
Punctuated equilibrium, it is rapid evolution with little change in between
