A doctor is performing a study under a very powerful microscope and records the following observations: Type of diet None observed Measure of growth No change in size or mass Amount of waste produced 0 micrograms Type of reproduction None observed Which of the following is the doctor most likely observing? A. a fungus B. a virus C. a protist D. a bacterium
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.
A doctor is performing a study under a very powerful microscope and records the following observations:
| Type of diet | None observed |
| Measure of growth | No change in size or mass |
| Amount of waste produced | 0 micrograms |
| Type of reproduction | None observed |
Which of the following is the doctor most likely observing?
-
A.a
fungus -
B.a virus
-
C.a protist
-
D.a bacterium
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