The elimination of resident bacterial populations is
a. beneficial to animals.
b. beneficial to opportunistic pathogens.
c. difficult because they are resistant to antibiotics.
d. unlikely because of their large numbers.
e. all of these.
Answer: b
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The stone tools and the dentition of Homo habilis indicate that early humans were
A. strictly carnivores. B. omnivores that could either scavenge or hunt for meat. C. strictly scavengers. D. strictly herbivores.
The method of uncovering general principles by carefully using the scientific method is called ________ reasoning.
Fill in the blank(s) with the appropriate word(s).
A fungus in the genus (Candida/Penicillium/Trichophyton) has recently been recognized as an opportunistic pathogen of AIDS patients
What will be an ideal response?
Nitrification of NH3 to NO2– is carried out by ________, whereas NO2– to NO3– is carried out by ________
a. Bacteria / Archaea b. Archaea / Bacteria c. Archaea / Archaea and Bacteria d. Bacteria and Archaea / Bacteria