The linking of dna fragments with plasmid vectors became possible with

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

d. groundwater flows through the subsoil and deposits minerals.