Which of the following is true?
a.
cells from different organs have nothing in common.
b.
cells from different organisms have nothing in common.
c.
every cell is exactly the same.
d.
cells from different organs may have similar structures.

The correct answer is: D.  Cells from different organs may have similar structures.

Explanation:

Every cell in an organism has something in common: its genetic information. Genetic information, in form of DNA, is stored in the nucleus of every cell.

According to the needs of every specific cell, different segments of the DNA are used to synthesize proteins that are useful for that cell. For example, a hepatocyte (cell in the liver) does not have the same proteins as a neuron (nervous cell) because their functions are hugely different, BUT they do share the same genetic information.

answer; 60-100; beats per minute

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.