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Introduction to Cell

the guard cel...

Question

the guard cells and nuclei canbe observed with a high coarse adjustment in high power in microscope or in low and fine adjustment in low power in a microscope?

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Solution

The guard cells and nuclei can be observed with a high coarse adjustment in high power in microscope.

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Q. A student focussed the leaf epidermal peel under the low power of microscope but could not see all the parts. He should :
(1) use the coarse adjustment knob again to focus the slide.
(2) use the fine adjustment knob to increase magnification.
(3) focus under high power using coarse adjustment knob.
(4) focus under high power using fine adjustment knob.

Q. A student was asked to focus a permanent slide under the high power of a microscope. This
involved the following steps which have not been written in a correct sequence :
(A) Place the slide on the stage
(B) Clean the microscope and lenses
(C) Focus the material with coarse adjustment
(D) Place the low power objective lens above the slide
(E) Sharpen the focus with fine adjustment
(F) Bring high power objective lens over the slide
Which one of the following is the correct sequence of steps for focusing the slide under high
power ?

Q. Students were asked to observe the permanent slides showing different stages of budding in yeast under high power of a microscope.
(a) Which adjustment screw (coarse/fine) were you asked to move to focus the slides?
(b) Draw three diagrams in correct sequence showing budding in yeast.

Q. A well stained leaf peel mount when observed under the high power of a microscope shows nuclei in :
(1) only epidermal cells
(2) only guard cells
(3) guard cells and epidermal cells
(4) guard cells, epidermal cells and stoma

Q. A student has to focus his compound microscope to observe a prepared slide showing different stages of binary fission in Amoeba. The steps he is likely to follow are listed below in a haphazard manner :
I. Adjust the diaphragm and the mirror of the microscope so that sufficient light may enter to illuminate the slide.
II. Fix the slide on the stage carefully.
III. Adjust the microscope to high power and focus.
IV. Adjust the microscope to low power and focus.
The correct sequence of the above steps to observe the slide under themicroscope is

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