Examlex
Which of the following cannot be determined for the material inside a black hole?
Atoms
The basic unit of a chemical element, consisting of a nucleus of protons and neutrons, and electrons orbiting the nucleus.
Proteobacteria
Largest bacterial lineage; members show a wide range of metabolic diversity.
Cyanobacteria
Photosynthetic, oxygen-producing bacteria.
Spirochetes
Group of small bacteria shaped like a stretched-out spring.
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