George Strait has the most #1 hits at 57 and counting. Nobody else comes close. Conway Twitty actually had the most until 2006 with 55 #1 hits. The Beatles are the musical act with the most songs to reach No. 1 on the Billboard singles chart. Mariah Carey has 18 such #1 hits and Elvis Presley 17.
Primary succession begins on rock formations, such as volcanoes or mountains, or in a place with no organisms or soil. This creates conditions nearer optimum for vascular plant growth; pedogenesis or the formation of soil is the most important process.
Primary succession occurs where the area is totally devoid of vegetation such as places devastated by volcanic activity or glaciations. Typical examples of primary succession are species such as lichens and algae. They form the base line for other species to sprout up and grow in the area.aking the example of a hydrosere where the primary succession has been wiped out due to environmental reasons, a secondary succession ensues in the form of a bog. This moss then results in the growth of higher species.