Methanogens are always engaged in relationships with other microbes because methane production requires
A. energy provided by another microbe.
B. interspecies hydrogen transfer.
C. removal of oxygen from the environment by another microbe.
D. None of the choices are correct.
Answer: B
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Which of the following statements is NOT true about fluid feeders?
a. They may have long tongues to effectively extract nectar from plants. b. They may gather organic material from soil located nearby. c. They may have piercing mouth parts to obtain blood from a host. d. They may secrete enzymes on a food source and consume it once it is liquefied. e. They may inject anticoagulants into a host to inhibit blood from clotting.
Subacute bacterial endocarditis is commonly the result of infections initially focused on the oral cavity.
Indicate whether the statement is true or false.
Inability to detect specific wavelengths of light associated with color; red-green color blindness is the most common type.
What will be an ideal response?
Which of the following emergence factors has contributed to the HIV/AIDS epidemic?
A) climate change B) rapid pathogen adaptation and change C) increasing travel to endemic areas D) exotic pet and meat trade