A friend tells you that the theory of evolution is just an educated guess by biologists about how things work. Evaluate this statement.

Which of the following is an example of qualitative data?a. The fish swam in a zigzag motion.b. The contents of the stomach are mixed every 20 seconds.c. The temperature decreased from 20°C to 15°C.d. The six pairs of robins hatched an average of three chicks each.

Which sentence best describes the logic of scientific inquiry?a. If I generate a testable hypothesis, tests and observations will support it.b. If my prediction is correct, it will lead to a testable hypothesis.c. If my observations are accurate, they will support my hypothesis.d. If my hypothesis is correct, I can expect certain test results.

Which of the following is a true statement of observational data?a. It is always qualitative, not quantitative.b. It is used to form hypotheses, but not to test them.c. It can include comparisons of fossils as well as DNA sequences.d. It is the type of data used for the independent variable in a controlled experiment.

PROCESS OF SCIENCE Explain why researchers formulate a null hypothesis in addition to a hypothesis when designing an experimental study.

Which of the following best describes the logic of scientific inquiry?a. If I generate a testable hypothesis, my experiments will support it.b. If my prediction is correct, it will lead to a testable hypothesis.c. If my observations are accurate, they will support my hypothesis.d. If my hypothesis is correct, I can expect certain test results.

A friend tells you that the theory of evolution is just an educated guess by biologists about how things work. Evaluate this statement.

A primary source of scientific results is .a. the news media;b. anecdotes from others;c. articles in peer-reviewed journals;d. the Internet;e. all of the above

A story on your local news station reports that eating a 1-ounce square of milk chocolate each day reduces the risk of heart disease in rats and that this result is statistically significant. This means that .a. people who eat milk chocolate are healthier than those who do not;b. the difference between chocolate-eating and chocolate-abstaining rats in heart disease rates was greater than expected by chance;c. rats like milk chocolate;d. milk chocolate reduces the risk of heart disease;e. two ounces of milk chocolate per day is likely to be even better for heart health than 1 ounce