The system responsible for defense against disease and harmful substances is the
a. circulatory system
b. endocrine system
c. immune system
d. excretory system
e. cardiovascular system
C
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Experiments cited in this chapter show that the distances away for both the Sun and the Moon are
A. closer to Earth than was thought in 1900. B. about 110 times their respective diameters. C. the same. D. impossible to say
The type of structure shown on the left side of this figure is a(n)
A. basin. B. syncline. C. monocline. D. thrust fault. E. anticline.
When water is pumped from a well, a depression is often produced in the water table. Such a depression is a(n) ________
A) perched water table B) artesian well C) pumping dimple D) cone of depression
Aquaculture ________
A) produces less fish per unit area compared to ocean water harvesting B) frequently results in unintended catch of nontarget species C) can bring economic benefits and food security to many developing regions D) requires the flooding of fields to produce water-intensive crops such as cotton and rice E) has no real environmental disadvantages