Those organisms that thrive in an environment free of oxygen are called
a. phytoplankton.
b. zooplankton.
c. nekton.
d. anaerobes.
e. aerobic.
D
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The ____________________ are vessels with the largest resistance to blood flow. Fill in the blank(s) with the appropriate word(s)
Which of the following terms is used to label the rhythmic changes in sympathetic and parasympathetic activity that affect heart rate coincident with respiration?
A) pulmonary sinus arrhythmia B) respiratory sinus rhythmia C) respiratory sinus arrhythmia D) lung sinus rhythmia E) pulmonary sinus rhythmia
The fluid portion of the chloroplast is called the ________.
A. cytoplasm B. thylakoid C. matrix D. gel E. stroma
"Rice water stools" are characteristic of
A) salmonellosis. B) cholera. C) bacillary dysentery. D) amebic dysentery. E) tapeworm infestation.