The correct answers are:
A. The southwest was covered with sand dunes. This period increased aridity in the southwest of the USA
.
D. Much of the northern United States was ice covered. During the last glacial period, the north of USA was covered by ice, in especial during the Last Glacial Maximum (LGM)
.
These answers are not correct:
B. Canada was covered with ice thousands of feet thick. During this period, Canada was almost completely covered in ice (97%); however, the ice was not so thick
.
C. Florida received heavy rains. Florida was drier during this period.
So by looking at the seismic waves from earthquakes the scientist learned about the crust and the mantle but they also learned about the outer and inner core. To do this you have to look at a different kind of waves, the S (secondary waves) waves that also get released by an earthquake.
A qualitative data is a data that cannot be quantified: for example gender, food preference and country. You can't measure the average, but you can measure the frequency of the data.
How she will organize it depends on the specific data, but in some cases (e.g.: food preference, party preference,favourite class) a pie chart might be a good idea.
Answer:
the body loses its ability to fight infections
There are four haploid cells after meiosis and cytokinesis. There are two diploid cells after mitosis and cytokinesis. It's easy to get confused. :D