Which of the following statements about biological transmission is FALSE?
A) The pathogen reproduces in the vector.
B) The pathogen may enter the host in the vector's feces.
C) Houseflies are an important vector.
D) The pathogen may be injected by the bite of the vector.
E) The pathogen may require the vector as a host.
C
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What is the function of companion cells?
a. These cells provide metabolic support to vessel elements. b. These cells provide metabolic support to sieve elements. c. These cells provide metabolic support to tracheids. d. These cells prevent water from entering the endodermis. e. These cells control the opening and closing of stomata.
What does the chi-square test tell us about the linkage of two genes?
What will be an ideal response?
Assemblages of abiotically produced polymers are called:a
stomatolites. b. protobionts. c. polyribosomes. d. endosymbionts. e. ribozymes.
During labor, what type of feedback mechanism involves the release of oxytocin, which stimulates the uterus to contract, and these contractions stimulate the release of more oxytocin resulting in ever stronger contractions?
What will be an ideal response?