Explain why cytotoxic t cells are not affective against bacteria.

Because cytotoxic T cells are activated with antigens.

Explanation:

Cytotoxic T cells are a type of white blood cell that expresses T-cell receptors that can recognize specific antigens to then be activated by them to neutralize an infected cell, antigens are structures that can stimulate an immune response, they are presented by the cells so T cells can identify them.

So, based on the previous information, cytotoxic T cells can't recognize or attack bacterias if their T cell receptors don't have an antigen presented by another cell to bind.

I hope this information clarifies your doubts!

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.

if you know your abc's you should be able to get your answer or just use google