All of the following maternal infections may cause congenital anomalies in the embryo, EXCEPT
A. Cytomegalovirus
B. Herpes
C. Rhinovirus
D. Rubella
E. Toxoplasmosis
Answer: C. Rhinovirus
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The protrusible rasping organ in a mollusk's mouth that is used to scrape food from the substrate is
A. a veliger. B. a visceral mass. C. composed of nacre. D. a radula. E. an ammonite.
What is the annual rainfall range experienced by grasslands?
a. 25 - 100 centimeters b. 5 - 15 centimeters c. 10 - 25 centimeters d. 80 - 110 centimeters e. 50 - 85 centimeters
The function of upstream promoter elements in eukaryotes, such as enhancers and silencers, is to:
a. serve as binding sites for RNA polymerase. b. regulate the efficiency of transcription initiation. c. regulate RNA polymerase binding to the TATA box. d. encode enhancer and silencer proteins. e. add methyl groups to genes.
Which of the following laboratory procedures is used for culturing animal viruses in the laboratory?
A) cell cultures B) broth cultures C) embryonated eggs D) both cell cultures and embryonated eggs E) synthetic cytoplasm