Please answer both questions correctly. Question 1 Robyn\'s group tested the eff

Question

Please answer both questions correctly.

Question 1 Robyn's group tested the effect of 5% and 10% ethanol on the heart rate of blackworms. Match the experimental components below. Question Selected Match Heart rate A. dependent variable Volume of drug administered D. independent variable Time between administering drug and recording heart beats D. independent variable Baseline heart rate (No drug exposure) C. control Concentration of ethanol D. independent variable Time spent recording heart beats B. constant All Answer Choices A. dependent variable B. constant C. control D. independent variable

Explanation / Answer

1. Robyn's group tested the effect of 5% and 10% ethanol on the heart rate of blackworms. the components are:

heart rate is dependent variable, volume of drug administered is independent variable, time between administering drug and recording heart beats is independent variable, baseline heart rate(no drug exposure is control for the measurement of the deviation on the administration of drug, concentration of ethanol is constant as it is given 5% and 10%, time spent recording heart beat is constant.

8. Height of trees is dependent on the amount of cadmium exposed, nutrients levels are independent variable as it is dependent on the quality of soil, biomass of trees is dependent variable as it relies on the level of cadmium exposed and its intake, water levels independent variable as the water allows the plant to uptake cadmium more, cadmium concentration is constant(controlled variable) as it is being exposed in fixed amount, group of trees exposed to cadmium(0ppm) is control.

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