Question

an experiment was designed to investigate the effect of sulfur on the heat rate of crickets. 60 crickets were placed in separate tanks in the same environment and received the same amount of food, the same amount of water, and the same type of food every day. 30 crickets with the same age, biological sex, and size. thirty were given sulfur and the other half were not. the heart rate of the crickets was measured... 17. what is the independent variable in this experiment? type a response

Explanation:

In an experiment, the independent variable is the factor that is manipulated or changed by the experimenter. From the context (even with partial text), it's about testing the effect of sulfur on tomato plants. One group (half) was given sulfur, the other not. So the independent variable is whether sulfur is applied (the manipulation: sulfur presence/absence).

Answer:

The independent variable in this experiment is the presence or absence of sulfur (or the application of sulfur, as one group was given sulfur and the other was not).