Answer:
B. So you can always see the entire object at the higher magnification
Explanation:
A microscope is used to view objects smaller than the naked or unaided eyes can see. The objective lens, in conjunction with the occular or eye lens, is used to achieve this purpose. The objective lens are of different magnifications as follows: 10X, 40X, 100X etc.
However, as the magnification increases i.e. higher objective, the object in the field of view becomes smaller and less focused. Hence, the object in the field of view must first be centered at a lower magnification/objective lens before changing to a higher one in order for the entire object to be seen at a higher magnification.
D
Not A, cause the graph shows the US imported more in 2010
Not B, cause both countries increase in trade
Not C, because Mexico economy has increased as well, just not as much--so not at the expense of mexico
Letter D because NAFTA was passed between 1990 and 1995, so the imports and exports to and from both countries clearly increased after that time period, at least slightly more than it was beforehand.
Answer:A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. ... Animal cells simply have a cell membrane, but no cell wall.
Explanation:
Answer:
The answer would be D. The fossil record
Explanation:
The fossil record is for <em>proving evolution</em>, <em><u>not</u></em><em> a factor that causes evolution</em>.