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Multiple Choice
Which cell structure distinguishes members of the domain Eukarya from other organisms?
A
Nucleus
B
Cell wall
C
Ribosome
D
Plasma membrane
Verified step by step guidance
1
Understand the three domains of life: Bacteria, Archaea, and Eukarya. Eukarya includes all eukaryotic organisms, which have complex cell structures.
Identify the key features of eukaryotic cells. Eukaryotic cells are characterized by having membrane-bound organelles, including a nucleus.
Compare the cell structures listed in the options: nucleus, cell wall, ribosome, and plasma membrane.
Recognize that the nucleus is a membrane-bound organelle that contains the cell's genetic material and is a defining feature of eukaryotic cells, distinguishing them from prokaryotic cells (Bacteria and Archaea), which lack a nucleus.
Conclude that the presence of a nucleus is the distinguishing feature of members of the domain Eukarya, setting them apart from other organisms in the domains Bacteria and Archaea.