Scelta multipla
Which domains of life are classified as prokaryotes?
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26. Prokaryotes
Introduction to Prokaryotes
Scelta multipla
You isolate a cell with the following characteristics:(1) no nucleus, (2) a cell wall, and the cell is (3) 2 μm in size. This cell could be a/an:
A
Bacterium.
B
Plant cell.
C
Animal cell.
D
Bacterial cell or a plant cell.
E
Plant cell or an animal cell.
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Identify the characteristics of the cell: no nucleus, a cell wall, and a size of 2 μm.
Recall that cells without a nucleus are classified as prokaryotic cells. Prokaryotic cells include bacteria and archaea.
Consider the presence of a cell wall. Both bacteria and plant cells have cell walls, but animal cells do not.
Evaluate the size of the cell. A size of 2 μm is typical for bacterial cells, which are generally smaller than plant and animal cells.
Conclude that the combination of these characteristics (no nucleus, presence of a cell wall, and small size) is consistent with a bacterium.
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