Question

When increasing the magnification, you need to permit more light through the sample. What are two ways you can accomplish this? When using oil immersion, what is the total magnification of the object you are viewing? After viewing both the hay infusion and the prepared slides of the different bacterial shapes, did you observe any bacteria in the hay infusion? Why or why not? Do you think there were bacteria in the hay infusion? What do you think would help observe bacteria in the hay infusion? In addition to different cell shapes, cell arrangements are also important in describing bacteria. Using your textbook, what are some arrangements bacterial cells may be found in? Underneath a microscope, single-celled fungi (a yeast) and some bacteria may appear similar. What would be a difference that could lead you to suspect a fungus? After using oil immersion, describe the procedure that is an absolute must before storing the microscope.

          When increasing the magnification, you need to permit more light through the sample. What are two ways you can accomplish this?

When using oil immersion, what is the total magnification of the object you are viewing?

After viewing both the hay infusion and the prepared slides of the different bacterial shapes, did you observe any bacteria in the hay infusion? Why or why not?

Do you think there were bacteria in the hay infusion?

What do you think would help observe bacteria in the hay infusion?

In addition to different cell shapes, cell arrangements are also important in describing bacteria. Using your textbook, what are some arrangements bacterial cells may be found in?

Underneath a microscope, single-celled fungi (a yeast) and some bacteria may appear similar. What would be a difference that could lead you to suspect a fungus?

After using oil immersion, describe the procedure that is an absolute must before storing the microscope.
        
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Added by Emilia B.

Biology for AP Courses
Biology for AP Courses
Julianne Zedalis, John Eggebrecht
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When increasing the magnification, you need to permit more light through the sample. What are two ways you can accomplish this? When using oil immersion, what is the total magnification of the object you are viewing? After viewing both the hay infusion and the prepared slides of the different bacterial shapes, did you observe any bacteria in the hay infusion? Why or why not? Do you think there were bacteria in the hay infusion? What do you think would help observe bacteria in the hay infusion? In addition to different cell shapes, cell arrangements are also important in describing bacteria. Using your textbook, what are some arrangements bacterial cells may be found in? Underneath a microscope, single-celled fungi (a yeast) and some bacteria may appear similar. What would be a difference that could lead you to suspect a fungus? After using oil immersion, describe the procedure that is an absolute must before storing the microscope.
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Transcript

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00:01 Okay, so this post has nine questions, so it's going to be a little bit hard to kind of like really explain each question, but i'm going to try to do my best.
00:12 So the first question is, if one bacillus cell is two micrometers, how many bacillus cells could fit end across the field? and how many 10 micrometer yeast cells could fit across the field? so that would be 1 ,000 bacillus cells will fit into the ville division.
00:40 And then 200 yeast cells.
00:47 Number two, so two ways you can enhance the resolving power.
00:52 You can use light source, shorter wavelength, or you can use an objective lens, of the same magnification.
01:28 So three, the advantages of the low power objective over the oil immersion objective for viewing fungi or algae.
01:37 So when viewing fungi or algae under the microscope, it is better to use the lower power objective than an oil immersion objective.
02:30 So what would occur if water were accidentally used in place of immersion oil? it will become blurry or cause distortion because water has a different refractive index...
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