Which groups are included among eukaryotic organisms?

Which groups are included among eukaryotic organisms?

• A. Fungi, protozoa, algae, and helminths
• B. Bacteria and archaea
• C. Viruses
• D. Viroids

Answer: (A)

Eukaryotic organisms have cells with a true nucleus and membrane-bound organelles, which is why fungi, protozoa, algae, and helminths are grouped together as eukaryotes. These organisms can be single-celled or multicellular and show complex cellular organization. By contrast, bacteria and archaea are prokaryotes, lacking a nucleus and most internal membranes. Viruses are acellular particles that need a host cell to reproduce and do not have a functioning cell; viroids are even simpler RNA molecules without a cellular structure. So, the group that fits as eukaryotic organisms is the one that includes fungi, protozoa, algae, and helminths.

Eukaryotic organisms have cells with a true nucleus and membrane-bound organelles, which is why fungi, protozoa, algae, and helminths are grouped together as eukaryotes. These organisms can be single-celled or multicellular and show complex cellular organization. By contrast, bacteria and archaea are prokaryotes, lacking a nucleus and most internal membranes. Viruses are acellular particles that need a host cell to reproduce and do not have a functioning cell; viroids are even simpler RNA molecules without a cellular structure. So, the group that fits as eukaryotic organisms is the one that includes fungi, protozoa, algae, and helminths.