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: Abiotic factors of an ecosystem are non-living things that influence the ecosystem and the organisms that live there. Some of the Abiotic factors of the Amazon Rainforest are things like water, humidity, soil, temperature, and rocks. The amazon rainforest gets about 9 ft of water in the form of precipitation every year. Because the rainforest is filled with a variety of species, water is an essential need for survival.