The Crenarchaeota and Euryarchaeota are

Question

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The Crenarchaeota and Euryarchaeota are the two phyla of the Archaea, distinct from the Bacteria domain. They are distinguished by differences in their cell wall structure, metabolism, and genetic makeup.

Answer: B
 Although they belong to different phyla, the Crenarchaeota and Euryarchaeota are closely related based on 16S rRNA comparisons. This indicates that they share a common ancestor and have diverged relatively recently in evolutionary history.

Answer: C
 The Archaea include several groups of extremophiles, but photosynthesis is not a common feature among them. However, some members of the Euryarchaeota are capable of anoxygenic photosynthesis, which differs from photosynthesis in cyanobacteria and plants.

Answer: D
 The Archaea were once classified as a type of bacteria, but advances in genomic sequence analysis have shown that they are actually a distinct domain of life, with unique features such as different membrane lipids and a distinctive translation system. Therefore, it is incorrect to say that the archaea are classified with the bacteria based on genomic sequence analysis.

The Crenarchaeota and Euryarchaeota Are