Question
Here are FOUR stages in the PREPARATION of a microscope slide to view some ONION cells, Which happens FIRST? Using TWEEZERS, peel off a thin membrane from a small piece of onion and place it on a glass slide Place the slide on the STAGE and set the microscope's OBJECTIV Elens initially to LOW POWER Starting with one edge touching the slide, drop a glass COVER SLIP over the onion by lowering it with a pin to AVOID AIR BUBBLES Carefully add a drop of IODINE dye to the slide
Answer
4.5
(377 Votes)
Henry
Elite · Tutor for 8 years
Answer
Using tweezers, peel off a thin membrane from a small piece of onion and place it on a glass slide.
Explanation
## Step 1: The question asks for the first step in the preparation of a microscope slide to view onion cells. We have four options given. We need to identify which one of these steps is performed first when preparing a microscope slide.## Step 2: The four steps given are: peeling off a thin membrane from an onion using tweezers and placing it on a glass slide, dropping a glass cover slip over the onion to avoid air bubbles, placing the slide on the stage and setting the microscope's objective lens to low power, and adding a drop of iodine dye to the slide.## Step 3: In the process of preparing a microscope slide, the first step is to obtain the sample that will be viewed under the microscope. In this case, the sample is a thin membrane from an onion. Therefore, the first step is to use tweezers to peel off a thin membrane from a small piece of onion and place it on a glass slide.