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What did Robert Virchow observe about cell division?
cells come from other cells
Are the nuclei invisible in the onion epidermal cells?
It can seen vaguely and invisible under the microscope
What would happen if a cell underwent repeated mitosis without cytokinesis?
multiple nuclei
Why do you use the onion for cell sample and not the leaf?
An onion is easy to peel to 1 layer of cells, and with a light microscope you cant see the individual cells in a leaf. Also the cell obtained from the bulb of onion is colorless, hence it can be easly stained with different dyes to study the cell organells under the microscope.
All leukocytes contain only a single nucleus so when observed under a microscope why does it appear that some of the leukocytes have more than one nucleus?
Some leukocytes, such as neutrophils, can have segmented nuclei that appear as multiple lobes. These segmented nuclei can give the appearance of multiple nuclei when observed under a microscope. This characteristic is known as polymorphism, and it is a normal feature of certain types of leukocytes.
What substance can a student use to make the nuclei of this organism more visible by compound light microscope?
A student can use a stain such as methylene blue or Giemsa stain to make the nuclei of the organism more visible under a compound light microscope. Staining techniques help to enhance the contrast between the nuclei and the surrounding tissue, making them easier to observe and study.
What cellular structures can be observed with a compound light microscope and with an electron microscope?
A compound light microscope can observe structures such as cell membranes, nuclei, and organelles like mitochondria and chloroplasts. An electron microscope can reveal smaller structures like ribosomes, endoplasmic reticulum, and even individual molecules within cells.
WHAT CAN BE SEEN IN A LIGHT MICROSCOPE?
A light microscope can be used to observe a variety of specimens, including living cells, tissues, and microorganisms. It allows for the visualization of structures such as nuclei, cell membranes, and organelles in detail, typically at magnifications up to 1000x. Staining techniques can enhance contrast, making it easier to identify specific cellular components. However, it has limitations in resolving power, making it less effective for observing very small structures like viruses or proteins.
Why do you stain an elodea leaf when observing cells?
because it is already green when you look at it so if you stain it, say with methylene blue, the color will change and you will not be able to recognize some of the structures in the cell like you would without it being stained.
What are the cell parts that are visible with simple compound microscope?
With a simple compound microscope, you can typically observe cell parts such as the cell membrane, nucleus, cytoplasm, and possibly some organelles like chloroplasts or mitochondria depending on the type of cell being observed. However, more detailed structures like the endoplasmic reticulum, Golgi apparatus, or lysosomes may not be visible without a higher magnification.
What did Robert Virchow observe about cell division?
cells come from other cells
Are the nuclei invisible in the onion epidermal cells?
It can seen vaguely and invisible under the microscope
Are the companion cell without nuclei?
It does not consist of nuclei
How can you prove that a cell is eukaryote?
You can examine the cell under a light microscope. Eukaryotic cells have nuclei, and these should be visible under a light microscope.
What can be observed when examining an onion under a microscope labeled with specific markers?
When examining an onion under a microscope labeled with specific markers, one can observe the different cell structures and components of the onion, such as the cell walls, nuclei, and cytoplasm. The markers help to highlight and distinguish these structures, allowing for a more detailed and precise analysis of the onion cells.
What Onion epidermis is a suitable tissue to use for observing cellular structures with a compound light microscope because this tissue is thin enough to?
Onion epidermis is a suitable tissue for observing cellular structures with a compound light microscope because it is transparent, allowing light to pass through easily, and the cells are thin enough to view individual cells and structures such as cell walls, nuclei, and chloroplasts. Additionally, the large size of onion cells compared to other plant cells makes it easier to study their internal structures.
Are there visible nuclei in the tissue?
Yes, nuclei are typically visible in tissue samples when viewed under a microscope. Nuclei contain DNA and are stained with dyes to make them more visible for analysis. They appear as dark, round structures within the cell.
