The maximum useful magnification for a light microscope is about
a. 100X.
b. 1000X.
c. 10,000X.
d. 100,000X.
c
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Ventricular fibrillation is occurring in a patient who has just arrived in the emergency room. Which one of the following treatments may be applied immediately to correct this potentially fatal arrhythmia?
A) implantation of an artificial pacemaker B) coronary artery bypass surgery C) cardioversion D) balloon angioplasty E) replacement of the defective heart valve
In flowering plants, the ____ generation is dominant
a. haploid gametophyte b. diploid gametophyte c. haploid sporophyte d. diploid sporophyte e. triploid endosperm
Molecules of extrachromosomal DNA in bacteria are known as
a) Golgi complexes b) lysosomes. c) plasmids. d) ribosomes.
Which of the following characteristics distinguish the archaea from the bacteria?
A) cell wall composition B) ribosomal RNA (rRNA) sequences C) the deoxyribonucleotides in the DNA D) cytoplasmic membrane lipids E) cell wall composition, cytoplasmic membrane lipids, and rRNA sequences