Assume a single-celled organism was discovered in water above 100°C. On closer inspection, it is determined that this organism was previously classified under the Archaea domain. Given this information, this organism most likely has:

Question

Assume a single-celled organism was discovered in water above 100°C.  On closer inspection, it is determined that this organism was previously classified under the Archaea domain.  Given this information, this organism most likely has:

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11ecba2d_0fd5_d833_a3bf_a1e80717fd17_MD0008_00 Cells can exist in many forms and sizes; some live as independent (free-living) organisms and others reside as a group in a colony or comprise the body of a multicellular organism. Based on their shared characteristics, all living organisms can be classified into one of three domains: Bacteria, Archaea, or Eukarya. Eukaryotic organisms fall under the Eukarya domain, but prokaryotic organisms fall under either the Bacteria or the Archaea domain. In this scenario, the organism is a member of the Archaea domain. Organisms classified under Archaea share traits with bacteria. Like bacteria, archaea are unicellular (single-celled), have a circular chromosome, have no membrane-bound organelles or nucleus, and reproduce asexually via binary fission. However, unlike bacteria, archaea do not have the chemical peptidoglycan in their cell wall (Choice A). (Choice C) Telomeres are regions of repetitive nucleotide sequences at the ends of eukaryotic chromosomes that shorten with each round of cell division. Telomeres are present only on linear eukaryotic chromosomes and protect these ends from deteriorating. In contrast, both archaea and bacteria have circular chromosomes (lacking telomeres). (Choice D) The nucleus, along with membrane-bound organelles (eg, Golgi body, endoplasmic reticulum), is found only in eukaryotic cells. Archaea and bacteria are known as prokaryotes because they lack membrane-bound organelles and have no nucleus. Educational objective: Prokaryotes are unicellular organisms that can be further classified into the domains of Archaea or Bacteria. Organisms in these domains lack a nucleus and membrane-bound organelles but have circular chromosomes and are able to reproduce asexually through binary fission. However, bacteria (not archaea) have peptidoglycan in their cell wall as a distinguishing feature.

Assume a Single-Celled Organism Was Discovered in Water Above 100°C