easy · Act science
A scientist observes a single-celled organism under a microscope. She notes the presence of a cell wall and ribosomes, but a complete absence of a nucleus or mitochondria.
How should this organism be classified?
- An animal cell, which typically features a cell wall and lacks a nucleus to allow for more mobility.
- A eukaryote, as the presence of a cell wall and ribosomes indicates a complex internal structure.
- A virus, which utilizes a cell wall for protection but does not require a nucleus for reproduction.
- A prokaryote, such as a bacterium, which lacks membrane-bound organelles like a nucleus.
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