Which statement describes the best procedure to determine if a vaccine for a disease in a certain bird species is effective?

A student is investigating the effect of different environmental factors on the growth of a certain species of bean plant. Which factor would NOT function as a variable?

A scientist performed an experiment to see the effects of a scary movie on the heart rate of people watching the movie. In this experiment, the dependent variable is:

Diagrams, tables and graphs are used by scientists mainly to:

A biologist reports a new discovery based on experimental results. If the experiment results are valid, biologists in other laboratories should be able to:

Conclusions based on an experiment are most likely to be accepted when:

Which statement best describes a hypothesis?

Which statement about the use of independent variables in controlled experiments is correct?

The development of an experimental research plan should NOT include a:

The first trial of a controlled experiment allows a scientist to isolate and test:

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