Why does immersion oil improve resolution?
A) It allows light to travel at a uniform speed on its way to the lens.
B) It decreases the working distance.
C) It increases the numerical aperture.
D) It increases numerical aperture and maintains a uniform light speed.
E) It increases the angle of refraction of the light.
D
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The ________ resemble the ancestor of all animals
a. choanoflagellates b. dinoflagellates c. amoeboflagellates d. euglenoids e. ciliates
Because all commercially produced energy has some kind of negative environmental impact, it is a good idea to
simply use ____.
a. wind energy b. solar energy c. less energy d. incandescent lightbulbs e. less water
What word below characterizes the amino acids that are found in an alpha helical segment that spans a membrane?
a) totally parallel b) predominantly antiparallel c) predominantly hydrophilic d) predominantly hydrophobic e) exclusively circular
What distinguishes a mitochondrion from a hydrogenosome?
a. absence / presence of hydrogen (respectively) b. generation of ATP through respiration / fermentation (respectively) c. sensitivity level to oxygen d. all of the above