The scala media is rich in k+ while the scale vestibuli and tympani are rich in na+.
a. true
b. false

The given statement is True.

Explanation:

Scala media has endolymph as its constituent and endolymph  is rich in Potassium ions (K+)

whereas

Scala tympani and  scala vestibuli has in its composition Perilymph and Perilymph has sodium ions as their major constituent ions.

Therefore, scala media is Potassium ion rich while scala tympani and vestibuli are sodium ion rich.

where is the option.let me know

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.