The ability of one person to produce over a million different antibody molecules does not require over a million different genes; rather, this wide range of antibody production is due to . The ability of one person to produce over a million different antibody molecules does not require over a million different genes; rather, this wide range of antibody production is due to . crossing over between the light and heavy chains of each antibody molecule during meiosis I alternative splicing of exons after transcription genetic DNA recombination rearrangements of cytosolic proteins in the thymus cells increased rate of mutation in the RNA molecules

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.

sorry, is there a picture? i do not see any arrows.

wut? unius0123 wut?