Koch's postulates are criteria used to establish that
A. microbes can be used to clean up toxic spills.
B. microbes are found on dust particles.
C. life forms can only arise from preexisting life forms.
D. a specific microbe should be classified in a specific kingdom.
E. a specific microbe is the cause of a specific disease.
Answer: E
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The primary function of humoral immunity (humoral response) is to _____
A) defend against fungi and protozoa B) reject transplanted tissues C) protect the body against cells that become cancerous D) protect the body against extracellular pathogens E) defend against bacteria and viruses that have already infected cells
An example of one of the ways a pH buffer helps to maintain homeostasis is to
A. increase the H+ concentration if pH decreases. B. reduce the H+ concentration if pH decreases. C. reduce the H+ concentration if pH increases. D. increase the OH- concentration if pH increases. E. reduce the OH- concentration if pH decreases.
Which of the following viruses can cause cancer?
A. Rous sarcoma virus B. hepatitis B C. papillomavirus D. Epstein-Barr virus E. All of the choices are correct.
Buoyant force
What will be an ideal response?