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.
A: Biotic factors are living organisms in an ecosystem, such as animals and plants. Abiotic factors are non-living physical and chemical elements in an ecosystem, and they can have a major influence on living organisms. Examples of abiotic factors are sunlight, oxygen, water, minerals and soil. Continue Reading