Notes for B4.2.7 Diversity of nutrition in archaea - IB | RevisionDojo
B4.2.7 Diversity of nutrition in archaea Notes
Archaea Are A Unique Domain of Life
Archaea are one of the three domains of life, alongside Bacteria and Eukaryotes.
Like bacteria, archaea are unicellular and lack a nucleus.
However, their genetic and biochemical characteristics often align more closely with eukaryotes.
Extreme Adaptations of Archaea
Archaea thrive in extreme environments, such as:
Hot springs with high temperatures.
Salt lakes and soda lakes with high salinity or alkalinity.
These conditions make many archaea difficult to culture in laboratories, leaving them less well-researched than bacteria or eukaryotes.
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Questions
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Question 1
Recap question
In a deep-sea hydrothermal vent devoid of light but rich in hydrogen sulfide (H₂S), which archaeal metabolic strategy would most directly support ATP generation and survival?
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Note
Archaea are one of the three domains of life, distinct from Bacteria and Eukaryotes. They are single-celled organisms that lack a nucleus, but their genetic and biochemical characteristics often resemble those of eukaryotes more than bacteria.
Archaea are unicellular organisms, meaning they consist of a single cell.
They lack a nucleus, a defining feature of prokaryotic cells.
Their genetic material is organized in a circular chromosome, similar to bacteria.
Despite their simple structure, archaea have unique biochemical features that set them apart.
AnalogyThink of archaea as a unique blend of characteristics, like a creature that looks like a fish but has the genetic makeup of a mammal.
DefinitionArchaeaA domain of single-celled organisms that are prokaryotic but have unique genetic and biochemical features.
