Biology 6 to 12
Question 2 of 30
Competency 1—Knowledge of the investigative processes of science
DIRECTIONS: Read the question and select the best response.
Biology students performed an experiment to determine the effect of temperature on heart rate in the crustacean Daphnia. Each group of students exposed Daphnia to varying temperatures from 0 °C to 30 °C and measured the number of heartbeats per minute for three Daphnia after 1 minute of exposure to each temperature. An average was taken for the three Daphnia at each temperature. Identify the independent variable for this experiment.
- Enter to expand or collapse answer.Answer expanded
- Correct Response: B.