Question 3 of 5 A scientist discovers that the turbidity of a river increased
over time. At the same time, its population of frogs grew
much smaller. When the turbidity of the river returned to
normal, the frog population recovered.
In what two ways can the frog population be used to monitor the river's water
quality?
A. It can indicate that the water is polluted.
B. It can indicate when the cloudiness of the water is too high.
C. It can be used to change the pH.
O D. It can be used to test for nitrates.

Discuss how social status may align with historical criticism.

The institute of international research is holding its annual convention. this year more than 500 scholars have been invited to hear research reports on many timely topics. approximately 250 big name scientists will be winging their way to washington, d. c. how can the underlined sentence be revised so that it fits the tone of the passage? a) approximately 250 people will be in washington, d. c. b) approximately 250 bigwigs will be flying to washington, d. c. c) approximately 250 science people will be going to washington, d. c. d) approximately 250 well-known scientists will be arriving in washington, d. c.

Read the corporate document. all employees of cozy clothes ltd. are entitled to a 40 percent discount on regularly priced merchandise and a 20 percent discount on sale-priced merchandise. to apply this discount to an employee purchase, follow this procedure: 1. enter the purchaser’s employee id number into the cash register when prompted. 2. apply the appropriate discount. 3. apply sales tax. 4. print an additional copy of the sales receipt. initial both copies. 5. add the additional copy to the register drawer to be included with the nightly closeout report. what is the purpose of the numbering in this document? to indicate steps in a process to emphasize supporting ideas to signal the text’s main ideas to show the meaning of policies