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.
The Indian Ocean Dipole (IOD) and the El Nino are independent climatic phenomena but often co-occur. Both IOD and El Nino result in change of global wind patterns.To know about the change of wind patterns, click here.However the cycle of IOD is shorter, while El Nino condition could last for even two years.he Indian Ocean Dipole (IOD) and the El Nino are independent climatic phenomena but often co-occur. Both IOD and El Nino result in change of global wind patterns.