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.
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
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