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.
Abiotic factors are non-living components that influence the biotic or living organisms that thrive in a specific biome. The presence and amount of abiotic factors in the Amazon are essential to the cycle of life of plants, animals and the decomposition of once-living things. They also affect the adaptation of plants and animals in the rainforest biome.