Search results
Results from the WOW.Com Content Network
Marine viruses are defined by their habitat as viruses that are found in marine environments, that is, in the saltwater of seas or oceans or the brackish water of coastal estuaries. Viruses are small infectious agents that can only replicate inside the living cells of a host organism , because they need the replication machinery of the host to ...
Viruses are found wherever there is life and have probably existed since living cells first evolved. [35] The origin of viruses is unclear because they do not form fossils, so molecular techniques have been used to compare the DNA or RNA of viruses and are a useful means of investigating how they arose. [36]
Some members of this family can have a linear double-stranded DNA while others have a circular double stranded DNA. The genome has been found to be up to 560 kilobases in length. Up to 50% of the DNA can be represented by guanine or cytosine. This virus is known to infect algae, which means it is found in the ocean. [26]
Viruses are found wherever there is life and have probably existed since living cells first evolved. [106] The origin of viruses is unclear because they do not form fossils, so molecular techniques have been used to compare the DNA or RNA of viruses and are a useful means of investigating how they arise. [107]
Orthopoxvirus particles. A DNA virus is a virus that has a genome made of deoxyribonucleic acid (DNA) that is replicated by a DNA polymerase.They can be divided between those that have two strands of DNA in their genome, called double-stranded DNA (dsDNA) viruses, and those that have one strand of DNA in their genome, called single-stranded DNA (ssDNA) viruses. dsDNA viruses primarily belong ...
The EsV-1 phaeovirus is an exception with 231 protein encoding genes, which means it has one gene per approximately 1450 bp. In spite of the compact genomes typically found in viruses, Phycodnaviridae genomes have repetitive regions usually near the terminal ends and certain tandem repeats located throughout the genome. It is suggested that ...
Evidence has been found, however, to indicate that viruses found in vent habitats have adopted a more mutualistic than parasitic evolutionary strategy in order to survive the extreme and volatile environment in which they exist. [32] Deep-sea hydrothermal vents were found to have large numbers of viruses, indicating high viral production. [33]
"The findings break from the traditional interpretation of marine ecology found in textbooks, which states that nearly all sunlight in the ocean is captured by chlorophyll in algae. Instead, rhodopsin-equipped bacteria function like hybrid cars, powered by organic matter when available—as most bacteria are—and by sunlight when nutrients are ...