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lesya [120]
3 years ago
12

The principle stating stating that the oldest rocks occur on the bottom of an undisturbed rock sequence is known as

Biology
1 answer:
Ulleksa [173]3 years ago
4 0
The principle of Superposition states that, in an undisturbed sequence, the oldest rocks are at the bottom of the sequence and successive layers are younger than those below them. This is different from relative dating because, relative dating examines rock position in aq sequence to determine the order of events the rock's relative age.
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Explain, in your own words, how you would use the light microscope to view a wet mount of a protist, assuming the microscope is
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Explanation:

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- The COARSE FOCUS KNOB is turned until the protist on the slide is brought into broad focus. The FINE FOCUS KNOB is then used to bring the image on the slide into sharp focus.

N.B: The OBJECTIVE LENS should not touch the cover slip on the slide during this process.

- When the protist on the slide is clear using lowest power objective lens, the revolver turret can be rotated to allow HIGHER POWER OBJECTIVE LENS.

- Due to higher magnification of the HIGH POWER OBJECTIVE LENS, the protist might need to be refocused using the FOCUS KNOBS.

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