Answers. Best Answer: Poxviruses are the only viruses that do not need a cellâs nucleus to replicate inside the cell. The variola virus is the only known cause of smallpox.The virus initially replicates in respiratory tract epithelial cells.From there, a massive asymptomatic viremia ensues, resulting in focal infection of the skin, intestines, lungs, kidneys, and brain.nswers. Best Answer: Poxviruses are the only viruses that do not need a cellâs nucleus to replicate inside the cell. The variola virus is the only known cause of smallpox.
Chemotrophs are organisms that obtain energy by the oxidation of electron donors in their environments. These molecules can be organic or inorganic. The chemotroph designation is in contrast to phototrophs, which utilize solar energy. Chemotrophs can be either autotrophic or heterotrophic. Chemotrophs are commonly found in ocean floors where sunlight cannot reach them because they are not dependent on solar energy. Ocean floors often contain underwater volcanos that can provide heat to substitut
Some organisms rely on organic compounds as a source of carbon, but are able to use light or inorganic compounds as a source of energy. Such organisms are not defined as autotrophic, but rather as heterotrophic.utotrophs can be photoautotrophs or chemoautotrophs. Phototrophs use light as an energy source, while chemotrophs utilize electron donors as a source of energy, whether from organic or inorganic sources; however in the case of autotrophs, these electron donors come from inorganic chemical sources.