Which of the following is an external stressor?
a. noise
b. low blood sugar
c. blood pressure
d. salt concentrations
e. pH
A
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As a result of a tariff on good X,
a. domestic producers of good X are better off because they sell more goods at a higher price. b. domestic producers of good X are better off because they sell more goods at the same price. c. domestic producers of good X are better off because they sell the same quantity of goods at a higher price. d. consumers of good X are better off because more domestically produced goods are available.
Which statement concerning radioisotope 14C
is false? a. It can be substituted for 12C in glucose and the body will still be able to use the compound. b. It has a different number of protons than 12C. c. It has more neutrons than 12C. d. It behaves the same chemically as 12C. e. It has six carbons and eight neutrons
Sharks differ from most other fish in that they lack
a. gill slits. b. scales. c. bone. d. paired appendages. e. teeth.
The collection of a substance in an organism's body tissues that becomes more concentrated in organisms higher on a particular food chain is called
a) concentration b) smog c) pollution d) biological magnification