Chronic low-level ingestion of ________ may cause liver cancer.

A. aflatoxin
B. aspergillin
C. ergotamine
D. phalloidin
E. psilocybin


Answer: A

Biology & Microbiology

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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)

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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

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In which stage of demographic transition is the death rate higher than the birth rate?

a. transitional b. postindustrial c. preindustrial d. industrial

Biology & Microbiology

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.

Biology & Microbiology