The scientists predict that the presence of activated ras in the double mutant r7 precursor cell will enable the cell to differentiate into an r7 precursor cell

straight or amphibians are homeothermic to thermal

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

i dont know it at allnow im just getting points at this pint

answer///multiple alleles;