Question 1
Which of the following characteristics distinguish the archaea from the bacteria?
◦ ribosomal RNA (rRNA) sequences
◦ cytoplasmic membrane lipids
◦ the deoxyribonucleotides in the DNA
◦ cell wall composition
◦ cell wall composition, cytoplasmic membrane lipids, and rRNA sequences
Question 2
The archaea known as halophiles
◦ require salt concentrations of 9% or greater to survive.
◦ require temperatures above 45
∘C to survive.
◦ are members of the Euryarchaeota and require salt concentrations above 9%.
◦ are members of the Euryarchaeota and require temperatures above 45
∘C.
◦ are members of the phylum Euryarchaeota.