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.
CHARACTERISTICS OF AQUATIC AND. TERRESTRIAL ENVIRONMENTS. 1) Copy and complete the following passage, using the words listed in the box below. food, disease, non-living, light, wind, living, oxygen, predators. The abiotic components of an ecosystem include ________ chemical and physical factors such. as temperature, pH, ________, available water and ________, salinity, ________ and substrate. composition. The biotic components of an ecosystem include all the ________ organisms. present and the effects they have on each other. Biotic factors that could affect the. distribution and abundance of a particular species include ________, competition from other.