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If it were two-dimensional you would not need to change focus on your microscope to see its structures.
Most cells contain structures that are transparent and without color, which makes visualization difficult, even with the aid of a microscope. Cell staining is used to gain more information about cells and tissues, and allows for the structures within cells to be seen in great detail
Usually cells are not flat, they come in a range of structures. However when observing under a optical microscope slide, they are flattened for better view.
Everything under a microscope is upside down and backwards
properties of the image under dissecting microscope
Chromosomes are not a theory they are real structures visable under the microscope.
If it is an optical microscope then the structures that can be see are those that are too small to be seen by the naked eye and larger than 1/2 a wavelength of light.
venlouie hook
because of the living cells
ovary
That is when the DNA is condensed, at which time it is called chromosome.
Iodine
If it were two-dimensional you would not need to change focus on your microscope to see its structures.
Large cell structures such as the nucleus and mitochondria can be seen under the light microscope if they are properly stained. In addition, chromosomes and centromeres can be seen during cell division.
under the ovary
Depends on what species the ovum belongs to. Generally Ovums (Eggs) tend to be round, and have "fill".
Most cells contain structures that are transparent and without color, which makes visualization difficult, even with the aid of a microscope. Cell staining is used to gain more information about cells and tissues, and allows for the structures within cells to be seen in great detail