Confidence votes 2.6K. A composite volcano is built up from alternate layers of ash and lava. It has steep sides because when it erupts it lava is thick and viscous (andesitic) meaning that it does not travel great distances and stays on the side of the volcano. An example is Mount Vesuvius (which destroyed Pompeii).onfidence votes 2.6K. A composite volcano is built up from alternate layers of ash and lava. It has steep sides because when it erupts it lava is thick and viscous (andesitic) meaning that it does not travel great distances and stays on the side of the volcano. An example is Mount Vesuvius (which destroyed Pompeii).
Primavera (software) Primavera is an enterprise project portfolio management software. It includes project management, product management, collaboration and control capabilities and integrates with other enterprise software such as Oracle and SAPâs ERP systems. Primavera was launched in 1983 by Primavera Systems Inc. and was acquired by Oracle Corporation in 2008.
From Wikipedia, the free encyclopedia. DNA primase, also called as DNA primerase, is an enzyme involved in the replication of DNA. DNA primase is a type of RNA polymerase which creates an RNA primer (later this RNA piece is removed by a 5' to 3' exonuclease); next, DNA polymerase uses the RNA primer to replicate ssDNA.he RNA segments are first synthesized by primase and then elongated by DNA polymerase. Then the DNA polymerase forms a protein complex with two primase subunits to form the alpha DNA Polymerase primase complex.