Question

Archaeans Choose one: A. are the likely source of chloroplasts and mitochondria. B. are much more restricted in environment than organisms classified as either bacteria or eukarya. C. are prokaryotic like bacteria, but their gene expression machinery is more similar to eukaryotic organisms. D. look like pre-eukaryotic cells with a nucleus.

Answer 1

Answer is C.

Step-by-step explanation:

Archaeans are prokaryotic , but their gene expression mechanism is more similar to that of eukaryotic organisms.

Archaeans are organisms that, like bacteria, lack a specific membrane around their genetic material. ... Unlike bacteria and Ukraine, Arachia has membranes containing branched hydrocarbon chains that are linked to glycerol via an ether linkage. Arachnoid cells do not contain peptidoglycan.

Answer 2

The correct answer is B: "Archaeans are much more restricted in environment than organisms classified as either bacteria or eukarya".

Step-by-step explanation:

The archaea domain is composed of prokaryotic unicellular microorganisms that lack a nucleus, nuclear membrane, and organelles, but they have a cell wall that protects the cell. They reproduce asexually.

Phenotypically, Archaea looks like Bacteria, being small and rounded, caned or spiriled-shaped, but they possess biochemical and genetic characteristics very different from bacteria.

Archaea are likely a source of mitochondria in eukaryotic cells. According to the endosymbiosis theory, these cells were free-living bacteria that were incorporated by another bigger cell, becoming the new organelle mitochondria. In the same way, Eukarya bacteria make a place for chloroplast.

These organisms are restricted to marginal habitats. They are capable of inhabiting in places with extreme temperature, salinity, acidity, or pH, among others.