Semiconservative replication was not the only model of DNA replication proposed during the mid-1950s, however. In fact, two other prominent hypotheses were put also forth: conservative replication and dispersive replication.
Main idea. Aquatic ecosystems are grouped based on abiotic factors such as water flow, depth,distance from shore, salinity, and latitude. Freshwater ecosystems. The major freshwater ecosystems include ponds, lakes, streams,rivers, and wetlands.
There's numerous biotic and abiotic factors of an ecosystem. Some include: abiotic: cool summers, windy conditions, heavy precipitation, fast flowing rivers, fast changes in a â¦ ltitude, and the temperatures vary with elevation. biotic: wildlife animals in the mountain forest like grizzly bears, cougars, etc.biotic factors are non-living parts of the environment that affect living organisms. The broad range of abiotic factors can be divided into two main categories: the physica â¦ l environment (terrain type, amount of water present, soil fertility) and weather (wind, cloud cover, temperature).