Reverse transcriptases are enzymes encoded in retroviruses viral genome. The enzyme is responsible for transcription of the viral RNA to produce a dsDNA that can be inserted into the host genome.
Pacific Ocean Basin. The Pacific Ocean is bounded on the east by the North and South American continents; on the north by the Bering Strait; on the west by Asia, the Malay Archipelago, and Australia; and on the south by the Southern Ocean.
A geological basin is a large low-lying area. It is often below sea level. Geological basins are one of the two most common places inland which collect sediment (the other is lakes). The type of rocks which form there tell about the palaeo climate of the continent. The geology is of interest to oil prospectors, hydrologists and palaeontologists.