Microscopic examination
The analysis of minute organisms, cellular organization of any biological structure, and composition of body fluids with the help of a microscope is known as microscopic examination. The magnification of specimens or samples under study helps in attaining a clearer picture of it.
Gram Staining
Named after Hans Christian Gram, a Danish bacteriologist, Gram stain is one of the most powerful staining techniques within microbiology. This technique was introduced in 1882 to identify pneumonia-causing organisms. The Gram staining technique uses crystal violet or methylene blue as primary staining colors to distinguish gram-positive from gram-negative organisms. Under a microscope, the gram-positive organisms appear purple-brown, retaining the primary color. Gram-negative organisms appear pink or red as they do not acquire the color of the primary stain.
Dana's friend thinks that in order to determine if the plant is alive, they will need a microscope. Does his logic make sense?
(a) it somewhat makes sense, but a good magnifying lens will also provide the evidence that they need to determine if the plant is alive
(b) no it doesn't, because the properties of living things are easy to observe without tools or technology
(c) it somewhat make sense, because some characteristics of life are observable by the naked eye, but cells can only be seen with a microscope
(d) yes it does, because cells are the only proof that something is living and can only be seen with a microscope
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