Reverse transcriptase is characteristic of retroviruses, including HIV (human immunodeficiency virus), the virus responsible for AIDS (acquired immunodeficiency syndrome). All retroviruses encode a polymerase enzyme in their pol gene that is both necessary and sufficient for the replication of their RNA genomes.
PDO positive phase global pattern. The Pacific Decadal Oscillation (PDO) is a robust, recurring pattern of ocean-atmosphere climate variability centered over the mid-latitude Pacific basin.
El Nino niÃ±o events are associated with a warming of the central and eastern Tropical, pacific While La nina niÃ±a events are, the reverse with a sustained cooling of these. Same areas these changes In The pacific ocean and its overlying atmosphere occur in a cycle known As TheâEl Nino (NIÃ±O). southern oscillation ensohese changes in the Pacific Ocean and its overlying atmosphere occur in a cycle known as the El NinoâNiÃ±o Southern (OSCILLATION). Enso the atmosphere and ocean, interact reinforcing each other and creating 'a feedback' loop which amplifies small changes in the state of the ocean into AN enso. event