Mucous membranes and tears contain antimicrobial substances such as _____.
What will be an ideal response?
IgA
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A collection of similarly specialized cells and any extracellular material they secrete and maintain describes
(a) an organ. (b) a system. (c) a tissue. (d) organelles.
The process of evolutionary changes that result in formation of new species and groups of species is called
A. temporal evolution. B. artificial selection. C. macroevolution. D. serial evolution. E. a combination of temporal and serial evolution.
Which of these muscles would you expect to have the greatest proportion of slow-twitch fibers?
A. the lateral rectus B. chicken breast muscle C. the soleus D. the gastrocnemius
Coral reefs form in areas where seawater temperatures average no less than:
a. 10° C. b. 18° C. c. 30° C. d. 40° C. e. 45° C.