Which of the following is not true of extended-spectrum beta-lactamases (ESBL) and gram negative bacilli?
A) Due to mutations in a bacteria's original chromosome
B) Should be included in the susceptibility testing for all of Enterobacteriaceae
C) Usually susceptible to carbapenems, cephamycins, and beta-lactamase inhibitors
D) ESBLs destroy carboxypenicillins, ureidopenicillins, aztreonam, and cephalosporins
Ans: A) Due to mutations in a bacteria's original chromosome
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In a reaction that is believed to be similar to pre-biotic chemical reactions, H2S can combine with FeS to form ____
Fill in the blank with the appropriate word.
A chromosome that results when the centromere splits in the wrong plane during meiosis, forming identical arms, is a(n)
A) ring chromosome. B) metachromosome. C) parachromosome. D) isochromosome.
Which of the following was a direct result of the development of agriculture?
1.Decreased limiting factors such as disease 2.Expanded geographic range 3.Increased carrying capacity 4.Increased population growth rate
The ________ is the first embryonic membrane to appear, and it is the first site of ________.
A. yolk sac, blood cell formation B. allantois, amniotic fluid formation C. yolk sac, placenta development D. amnion, umbilical cord formation E. chorion, neural system development