URGENT NEED HELP IMMEDIATELY 3. A microscope has a field diameter of 2,000 microns under a total low power magnification of 100
X. This microscope has a 10X power ocular. Given this information, answer the following
questions that appear below.
a. What is the power of the low power objective lens?
b. If a cell which is observed takes up approximately 1/6 of the field of view under low power,
what is its approximate length?
c. If we now switch to high power using the 60 X objective lens, what is the magnification of
this microscope?
d. Under the high power magnification you calculated in part (c.) above, what is the
approximate length of our cell under high power?
About how much of the high power field diameter (fractional amount) does this cell occupy?
e.

from almost the creation of the first true maps of the earth, people started seeing how continents would be able to fit together.   in particular, people noticed that south america fits almost exactly into africa.

you should be aware that while world maps were around early in the 1600’s and better defined by the end of the 1700’s, those maps were not ‘public’ but were treated as state secrets.   and so it was not till much later that the broader ‘science’ community had access to good quality and accurate world maps.

get the whole story here…

it is now known that most of the major continental masses can be fit together in a jigsaw process.   in fact we now know that the continents were indeed once all joined together as one land mass – the supercontinent of pangaea.

if you look at most world maps you will ponder how this is evidence, as the continents really don’t appear to ‘fit’ together very well.   what you need to understand is that the vast majority of maps are drawn using a map projection that has the north and south poles (which are points) are a line the width of the map at the top and bottom.   this means that the map distorts the true shape of the earth’s land and oceans as you love closer to the poles.     some other map projections distort less, but have the map shape looking like segments of an orange.   see here for a range of map projections.   check out the way greenland changes size in each!

what is more remarkable, is the next piece of evidence when added to the shape of continents.

location of mountains and fossils

what is remarkable, when you reassemble all the continents together, the ancient mountain ranges (many now eroded to their cores) and the location of rock types and fossils all match up.

d) center of the mid-ocean ridge

give brainleysest

sinserly,

steckh986

the principle of segregation describes how pairs of gene variants are separated into reproductive cells. from his data, mendel formulated the principle of segregation. we now know that the segregation of genes occurs during meiosis in eukaryotes, which is a process that produces reproductive cells called gametes.