Answer:
b. domains is the correct answer
Explanation:
A domain is a taxonomic classification higher than the kingdom level.
The three-domain system proposed by Carl Woese.
The three domains classification
- Bacteria: they have no nuclear membrane.
Examples: Cyanobacteria, Actinobacteria
- Archaea: are prokaryotic and they do have a nuclear membrane.
Examples: methanogens, thermoacidophile
- Eukarya: they have a membrane-bounded nucleus.
Examples: Saccharomycotina,Bryophytes
