Which type of microscopy would be preferred for showing fine internal detail of the eukaryotic organelles?
A. Bright-field microscopy
B. Transmission electron microscopy
C. Scanning electron microscopy
D. Fluorescence microscopy
Answer: B
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Blood cultures collected for the recovery of N. gonorrhoeae or N. meningitidis require:
a. no special methods. b. more than 0.025% sodium polyanethol sulfonate (SPS). c. transfer from Vacutainer tubes to culture broth within 1 hour of collection. d. less than 0.025% SPS.
Which of the following is the correct order of plant evolutionary appearance (geologically oldest to present date)?
A) angiosperms, gymnosperms, psilopsids, pteriodophytes B) gymnosperms, angiosperms, psilopsids, pteriodophytes C) psilopsids, pteriodophytes, gymnosperms, angiosperms D) pteriodophytes, gymnosperms, angiosperms, psilopsids
The members of the supergroup Archaeplastida that have cell walls impregnated with calcium carbonate and help build coral reefs are the
A. multicellular green algae. B. dinoflagellates. C. brown algae. D. diatoms. E. red algae.
Recurrent episodes of rheumatic fever would MOST likely cause:
A) metastatic brain cancer. B) frequent streptococcal infections. C) progressive failure of the liver. D) permanent damage to the heart valves.