microbiology straighterline final Exam with Verified Solutions

microbiology straighterline final Exam with Verified Solutions phylogeny - Answer -The study of evolutionary relationships among organisms is called ______. Last Universal Common Ancestor - Answer -The three cell types discussed, eukaryotes, archaea, and bacteria, all derived from ______. always harmful to their host - Answer -Organisms called parasites are ______. Thermal hot springs warmed by heat from earth's interior - Answer -Which of the following does not indicate microbe involvement in energy and nutrient flow? Electrons - Answer -The subatomic particles that surround the nucleus are the ______. respiratory disease - Answer -The number one worldwide infectious diseases are ______. saturated - Answer -A fat is called _____ if all carbons of the fatty acid chain are single-bonded to 2 other carbons and 2 hydrogens. lipid - Answer -One technique for staining bacteria for viewing under the microscope is called the Gram stain. In this technique, alcohol is used as a decolorizer because it degrades the outer membrane found in some bacteria. What chemical component of the cell does alcohol affect? 95X - Answer -If a microbiologist is studying a specimen at a total magnification of 950X, what is the magnifying power of the objective lens if the ocular lens is 10X? cell size of 0.5 to 2 microns - Answer -NASA has published a list of criteria for identifying fossil bacteria in samples from Mars, as part of a search for evidence of life. Which of the following is good evidence for the presence of bacterial cells? electron - Answer -Which type of microscope achieves the greatest resolution and highest magnification? a solid medium - Answer -Which of the following is produced by adding 1% to 5% agar to nutrient broth that is then boiled and cooled? Creutzfeldt-Jacob disease - Answer -a spongiform encephalopathy of humans amphitrichous - Answer -The term that refers to flagella at both poles of the cell is ______.saprobe - Answer -In the condition called athlete's foot, the fun