bulk filter-feeding (baleen only) (not to scale) Pleist. 1.8 Pliocene 5.3 Late bulk filter- macrophagy (teeth only) feeding (teeth/baleen)- 11.6 Middle 15.9 Early 54(3) 23.0- Late 28.0- 63(4)- 194(8) 100(13) 92(5) Early 76(4 large body size ledentulous rostrum| 57(2)~ 34.0- baleen elongated and flattened rostrum Late 99(9) 38.0- Middle small body size foreshortened rostrum fibrocartilaginous mandibular symphysis broad-based rostrum 48.6 Early 5. 100(35) Figure 1. The phylogenetic tree of the Mysticeti. Question 3. Janjucetus hunderi was a small, toothed whale that was thought to actively hunt prey rather than filter feed. Why is it considered to be a basal mysticete rather than an odontocete? Eocene Oligocene Miocene Zygorhiza
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.
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