Archaea a. have a cell wall composed of peptidoglycan. b. are more closely related to eukaryotes

step 1 Which of these is true of Archaia? They have a peptidoglycan cell wall. They are more closely re

Archaea a. have a cell wall composed of peptidoglycan. b....

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Key Concepts

Unicellularity

Archaea are typically unicellular organisms, meaning each individual is a single cell. They do not form multicellular structures, which distinguishes them not only from many eukaryotes but also underscores their classification among the prokaryotes.

Prokaryotic Cell Structure

Despite their evolutionary closeness to eukaryotes in certain molecular aspects, archaea are prokaryotic, meaning they lack a membrane-bound nucleus and other membrane-enclosed organelles. This cellular organization is a defining feature of prokaryotes.

Cell Wall Composition

Archaea have a unique cell wall structure that does not include peptidoglycan, which is characteristic of bacterial cell walls. Instead, many archaea possess cell walls composed of proteins, glycoproteins, or other polymers like pseudomurein, highlighting the biochemical diversity among prokaryotes.

Phylogenetic Relationships

Archaea are evolutionarily distinct from bacteria and have many molecular similarities with eukaryotes, such as aspects of their transcription and translation machinery. This genetic and biochemical affinity suggests that archaea share a more recent common ancestor with eukaryotes than with bacteria.

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