Microorganisms which are similar in size and structure to bacteria but are genetically different..
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Biological specimen
In microscopy, a whole organism, cells, tissues, a small piece of tissue, or other structures, eg hair, pollen grains, that are viewed with a microscope.
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Calibrate
To set an instrument or scale against a standard.
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Compound microscope
A compound microscope uses two lenses, the objective lens and the eyepiece. The very short focal length objective lens produces a greatly-magnified image, then the short focal length eyepiece magnifies this further.
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Eukaryotic cell
A type of cell that has a nucleus.
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Eyepiece
Is the lens at the top of a compound microscope. It has a longer focal length than the objective lens and magnifies the image produced by the objective.
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Field of view
The area seen when looking through a microscope.
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Graticule
A glass or plastic disc fitted into the eyepiece of a microscope.
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Light microscope
Device that uses visible light and a series of lenses to produce an enlarged image of an object.
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Magnification
The amount that an image of something is scaled up when viewed through a microscope.
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Micrograph
A photograph taken of a microscopical image.
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Mitochondria
Structures in the cytoplasm of all cells where aerobic respiration takes place.
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Mounted needle
A needle mounted in a wooden or metal handle for use in microscope work or dissection.
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Objective lens
The lens closest to the specimen has a very short focal length and produces a greatly magnified image of the specimen.
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Order of magnitude
A number, to the base ten, often used to make comparisons. For each order of magnitude, a number is ten times the previous one.
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Prokaryotic cell
A simple cell that does not have a nucleus – the DNA is free in the cytoplasm.
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Resolution
The fineness of detail that can be seen in an image.(THE HIGHER THE RESOLUTION, THE MORE DETAIL IT HOLDS)
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Ribosome
The site of protein synthesis.
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Significant figure
Giving a number to a specified number of significant figures is a method of rounding.(AN EXAMPLE: IN A NUMBER 7483 THE SF WOULD BE 7 SINCE IT IS THE VALUE OF 7000 IN MATHMATIC TERMS).
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Stage micrometer
A glass slide with a scale etched on it. It is used to calibrate the eyepiece graticule of a microscope.
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Standard form
A system in which numbers are written as a number greater than 1 and less than 10 multiplied by a power of 10 which may be positive or negative.
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Sub-cellular
Structures smaller than a cell that are found within it.
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Tissue
A group of similar cells that carry out the same function, eg muscle tissue.
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Virus
An ultramicroscopic infectious non-cellular organism that can replicate inside the cells of living hosts, with negative consequences.
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Other cards in this set
Card 2
Front
In microscopy, a whole organism, cells, tissues, a small piece of tissue, or other structures, eg hair, pollen grains, that are viewed with a microscope.
Back
Biological specimen
Card 3
Front
To set an instrument or scale against a standard.
Back
Card 4
Front
A compound microscope uses two lenses, the objective lens and the eyepiece. The very short focal length objective lens produces a greatly-magnified image, then the short focal length eyepiece magnifies this further.
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