Which of the following statements about a complete digestive system is false?
a. It is characteristic of flatworms.
b. It is a tube with two openings.
c. Its regions are specialized to perform specific functions.
d. Food can be ingested while previously eaten food is being digested.
e. Food enters the mouth and is eliminated through the anus
A
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The polymerase chain reaction (PCR) is used to:
A. generate single copies of whole chromosomes. B. generate multiple copies of whole chromosomes. C. generate a single copy of a targeted region of DNA. D. generate multiple copies of a targeted region of DNA. E. b and d.
Which of the following bacteria are the most prevalent in the human gut?
A. cyanbacteria B. staphylococci C. Borrelia D. Bactericides
Routine activities and energy conservation are controlled by the:
A) thalamus. B) peripheral nervous system. C) parasympathetic division. D) sympathetic division.
All the following are correct about the polio vaccines, except
A. Dr. Jonas Salk developed the IPV vaccine in 1954. B. the inactivated polio vaccine (IPV) can occasionally revert to a neurovirulent strain. C. the virus is transmitted through the fecal-oral route. D. most infections do not result in paralysis. E. treatment for polio involves mainly alleviating pain and suffering.