Eukaryotic cell walls lack peptidoglycan, but type unspecified Steps:

• Penicillin targets peptidoglycan in bacterial cell walls, inhibiting synthesis and causing harm.
• Species X, a eukaryote, produces penicillin unharmed, indicating its cell walls differ chemically from bacterial ones.
• Thus, species X cell walls cannot be peptidoglycan (statement 1 false).
• Eukaryotes may have cellulose (algae/plants) or chitin (fungi) walls, but no evidence specifies which for this single-celled species.
• No statements 1–3 can be definitively concluded.

Why no options are correct:

• Information excludes peptidoglycan but provides no details on cellulose or chitin composition.

Final answer: Not enough information.