The most common nationally notifiable infectious disease in the United States is:

A) chlamydial genital infections.
B) gonorrhea.
C) the common cold.
D) tuberculosis.


A) chlamydial genital infections.

Biology & Microbiology

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Small cells function more effectively, because as cells become larger their surface area to volume ratio:  

A.  decreases. B.  is cubed. C.  increases. D.  stays the same. E.  is squared.

Biology & Microbiology

In 2012, the International Olympic Committee began using tests that measure the levels and the body's response to the male hormone ____________________ as a means of distinguishing females from males when sex was questionable

Fill in the blank(s) with correct word

Biology & Microbiology

What is gross primary production?

A. The carbon fixed during photosynthesis. B. The carbon fixed after cellular respiration is accounted for. C. Energy released by primary consumers. D. Photosynthetic production plus energy recycled by detritivores.

Biology & Microbiology

A tendon or ligament is made up principally of ________ tissue

Fill in the blank(s) with correct word

Biology & Microbiology