Chronic low-level ingestion of ________ may cause liver cancer.
A. aflatoxin
B. aspergillin
C. ergotamine
D. phalloidin
E. psilocybin
Answer: A
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Bacterial vaginosis may be the result of transfer from the rectum where the causative organisms usually reside in addition to occurring by means of sexual transmission.
Answer the following statement true (T) or false (F)
In which stage of demographic transition is the death rate higher than the birth rate?
a. transitional b. postindustrial c. preindustrial d. industrial
A piece of DNA that is self-replicating and is used to carry desired genes into new cells is called a(n)
a. library. b. clone. c. vector. d. intron
An individual can safely engage in anal intercourse
a) without a condom if the partner is negative for all sexually transmitted infections (STIs). b) without a condom if the partner has cleaned the anus and anal canal, using an enema. c) with a latex condom regardless of the partner's STI status. d) with a latex condom and baby oil for lubrication regardless of the partner's STI status.