A group of scientists are hypothesizing that a stream is highly polluted. One of them suggests sampling the invertebrates that live there. Another suggests using a sensor to measure the levels of pollution. Which method of sampling will give the most accurate result?
Which of the following best defines an indicator species?
Different aquatic invertebrates are able to survive in different levels of water pollution. By studying what aquatic invertebrates inhabit an area of water, it is possible to determine how polluted that area of water is.
What are these aquatic invertebrates an example of?