Isela has been tasked with viewing a stained bacterial sample and she is trying to decide the type of microscopy to use. She will want to see the dark color of the stained dead cells clearly. Which type of microscopy will most likely give her the results she is looking for?
> Bright field microscopy
> Dark field microscopy
> Phase microscopy
> Photon microscopy
> Bright field microscopy
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Plant defenses against herbivore grazing include
(a) thorns. (b) plant secondary compounds. (c) mobility. (d) both a and b.
Bacteria are grown in 15N (heavy) medium and then transferred to 14N (light) medium and allowed to replicate for 2 generations. The DNA is subsequently isolated and centrifuged in a CsCl2 gradient to yield what type of gradient band(s)?
A. one heavy band B. one light band C. one half-heavy (intermediate to heavy and light) band D. one heavy and one half-heavy band E. one light and one half-heavy band
A spherical shaped bacteria is called:
a. coccus. b. auxospore. c. bacillus. d. bacteria phage. e. spirillus.
Bile aids in fat digestion by
A) removing the fatty acid chains from the glycerol. B) acting directly as a lipid-digesting enzyme. C) converting lipids to proteins, which can then be digested by proteases. D) breaking fat into small fat droplets that can then be digested by enzymes.