Which question is not answered by the article? А
Why are scientists with the National Park Service especially interested in lichen?
B
How did Buhler and other world-class climbers help scientists with the project?
с
When do scientists expect to finish their list of Yosemite's biology?
D
How many unfamiliar lichen species did rock climbers and scientists find in Yosemite
Park?

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.

i think the answer is g1

hope i

-lavira: )

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.