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Biol 373- Exam #1 questions well answered to pass
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Biol 373- Exam #1 questions well answered to pass
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Biol 373- Exam #1Chapter 1 - correct answer ✔✔Evolution
Robert Hooke (1665) - correct answer ✔✔observed compartments in cork, under a microscope, and first
named them cells
resolution - correct answer ✔✔-resolving power (ability to see fine detail)
-the ability to distinguish two adjacent objects or points from one another
Resolving power (RP) = - correct answer ✔✔Wavelength of light in nm / 2 x Numerical aperture
-Shorter wavelengths provide a better resolution
What is the descriptive nature of cell biology - correct answer ✔✔focus on observation, with little
emphasis on explanation
Compound microscopes (1830s) - correct answer ✔✔-These had two lenses
-Both magnification and resolution were improved
-Structures only 1 micrometer in size could be seen clearly
Robert Brown - correct answer ✔✔identified the nucleus, a structure inside plant cells
Matthias Schleiden - correct answer ✔✔concluded that all plant tissues are composed of cells
Thomas Schwann - correct answer ✔✔concluded that all animal tissues are composed of cells;
postulated the cell theory (1839)
, What is the cell theory? - correct answer ✔✔1. All organisms consist of one or more cells (Schwann
1839)
2. The cell is the basic unit of structure for all organisms (Schwann 1839)
3. All cells arise only from preexisting cells (Virchow 1855)
Cytology - correct answer ✔✔focuses mainly on cellular structure and emphasizes optical techniques
Biochemistry - correct answer ✔✔focuses on cellular structure and function
Genetics - correct answer ✔✔focuses on information flow and heredity and includes sequencing of the
entire genome (all of the DNA) in numerous organisms
micrometer (μm) - correct answer ✔✔one millionth of a meter (10-6 m)
nanometer (nm) - correct answer ✔✔one-billionth of a meter (10-9 m)
microtome (mid-1800s) - correct answer ✔✔-allowed preparation of very thin slices of samples
limit of resolution - correct answer ✔✔how far apart objects must be to appear as distinct
The smaller the microscope's limit of resolution, the greater its - correct answer ✔✔resolving power
Electron Microscopy (Ruska 1930's) - correct answer ✔✔-Focused electron beam
-Wavelength = 6pm
-100,000 X less than red visible light
Fredrich Wöhler (1828) - correct answer ✔✔-showed that a compound made in a living organism (urea)
could be synthesized in the lab
Louis Pasteur (1860s) - correct answer ✔✔showed that yeasts could ferment sugar into alcohol
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