The carcinogen aflatoxin is produced by the fungus
A. Claviceps purpurea.
B. Staphylococcus aureus.
C. Coccidioides immitis.
D. Histoplasma capsulatum.
E. Aspergillus flavus.
E. Aspergillus flavus.
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The segmented worms of the phylum Annelida
a. have an open circulatory system. b. possess setae on each segment. c. are acoelomate. d. move by use of flagella. e. display radial symmetry.
In passive transport, the movement of a small,
nonpolar molecule across a cell membrane depends on
a. adequate amounts of ATP. b. a concentration gradient. c. adequate ATP and a concentration gradient d. the proper transport protein. e. gated channels.
It is common for infections to produce no noticeable symptoms. Infections of this nature are termed _____, or inapparent
Fill in the blank(s) with the appropriate word(s).
____________________ tissues covering the body's surfaces and lining its internal spaces are the initial site of most cancers because their cells are rapidly dividing.
Fill in the blank(s) with the appropriate word(s).