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.
the abiotic factors of an ecosystem are the nonliving things that affect the reproduction and survival of living organisms living organisms interact with these abiotic factors in many ways oak trees need the right amount of sunlight to grow if the soil is too acidic some of the wildflowers in the forest might not survive biotic factors are the living things in an ecosystem they interact with each other as well as the nonliving things around them