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

Biology & Microbiology

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The ________ resemble the ancestor of all animals

a. choanoflagellates b. dinoflagellates c. amoeboflagellates d. euglenoids e. ciliates

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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

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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

Biology & Microbiology

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

Biology & Microbiology