Light microscopes Study guides, Class notes & Summaries

Bright Field Microscope CORRECT ANSWER Most widely used Dark object, bright background Examine stained and unstained specimens Made by putting light through specimen Dark field microscope CORRECT ANSWER Image is lighter than illuminated background Uses a condenser on the light microscope Phase contrast microscope CORRECT ANSWER Used with live specimen Produces image with specimen against gray background Can see internal cells Scanning electron microscope CORRECT ANSWER Detailed 3D...

Microbiology LAB Exam 1 with Complete Solutions Microscope- The Condenser focuses the light ging into the objective lens Microscope- The Iris Diaphragm adjusts the amount of light going into the objective lens Microscope- Nosepiece holds the objective lenses and rotates to change from one objective to another Microscope- Coarse Objective Knob moves the stage larger distances to help get the object in focus Microscope- Fine Adjustment Knob moves the stage smaler increments to help get the obj...

Last Universal Common Ancestor (LUCA) CORRECT ANSWER Was a microbe of unknown type that lived about 4 billion years ago; the origin of all organisms. What is 16s small unit rRNA used for? CORRECT ANSWER It's used to study construct phylogenetic trees of organisms because it's highly conserved and hasn't changed much over time. Antonie von Leeuwenhoek CORRECT ANSWER Father of microscopy in 1620 Increased surface area like folded membranes CORRECT ANSWER How do larger cells maximize di...

Stern's Introductory Plant Biology, 14e (Bidlack) Chapter 1 What Is Plant Biology? 1) The early scientist who first demonstrated experimentally that plants do not have the same modes of nutrition as animals was A) Nehemiah Grew. B) Carl Willdenow. C) Alexander von Humboldt. D) Sir J. D. Hooker. E) J. B. van Helmont. Answer: E Topic: Diversification of Plant Study Bloom's: 1. Remember Learning Outcome: 01.04 List the aspects of botany with which each of the major botanical disciplines ...

beta-oxidation correct answer: enzymes repeatedly split off pairs of they hydrogenated carbon atoms that make up a fatty acid and join each pair to coenzyme A to form acetyl-CoA Chloroplasts correct answer: light harvesting structures found in photosynthetic eukaryotes; synthesize a few polypeptides compare and contrast archaeal flagella with bacterial flagella correct answer: archaeal are about half as thick as bacteria; not hollow; lack a central channel; flow together; powered by ATP...

Describe Koch's postulates and the significance of his experiment - Koch's postulates: with the use of anthrax provided a basis for Germ Theory. the experiment: extract blood from diseased individual grow culture put culture into healthy individual, develop disease extract this blood, culture it to show same results Describe the importance of Louis Pasteur and the significance of his swan-neck flask experiment - Disproved spontaneous generation (miasma) the swan-neck made contamination...

Homeostasis When organisms maintain a stable internal environment even when external conditions change Metabolism Combination of chemical reactions taking place within an organism Stimulus A signal to which an organism responds Biosphere Means "living planet" Robert Hooke Scientist who looked at cork through a microscope and gave the name to cells Light Microscope A type of microscope Can magnify 1000x Not as strong as other microscopes Uses light Scanning Electron Microscope A typ...

Homeostasis When organisms maintain a stable internal environment even when external conditions change Metabolism Combination of chemical reactions taking place within an organism Stimulus A signal to which an organism responds Biosphere Means "living planet" Robert Hooke Scientist who looked at cork through a microscope and gave the name to cells Light Microscope A type of microscope Can magnify 1000x Not as strong as other microscopes Uses light Scanning Electron Microscope A typ...

IB Biology 1.2 Latest Update Already Passed Resolution Resolution is defined as the shortest distance between two points that can be distinquished Explain why electron microscopes have a better resolution than light microscopes because the wavelength of the electrons is thousands of times smaller than the wavelength of light. Ultrastructure all the structures of a biological specimen that are at least 0.1 nm in their smallest dimension Something that electron microscopes can se...

Objectives:  Identify when a stereomicroscope (dissecting microscope) versus a compound light microscope would be used in the lab  Describe the major differences between light microscopes and electron microscopes  Identify the parts of a compound light microscope and stereomicroscope  Describe the proper way to carry a microscope  Determine the total magnification of an object being viewed by a compound light microscope if given the ocular lens and objective lens magnifi...