Answer:
EXERCISE
Explanation:
In an experiment, the independent variable is the variable that the experimenter changes or manipulates in order to bring about a measurable outcome.
In this case, an experiment is carried out to test the hypothesis that "exercise will affect the number of times a person can squeeze a clothespin in a certain amount of time". The experiment contained two groups (one group sits quietly before squeezing a clothespin as many times as possible and the other does 25 JUMPING JACKS before squeezing a clothespin as many times as possible).
The independent variable is the EXERCISE (jumping jacks) that was changed for each group in the experiment.
The lining is the e<span>ndometrium </span>
Carbon dioxide (CO²) is taken in to start the Calvin Cycle.
Rheumatoid arthritis: A chronic progressive disease causing inflammation in the joints and resulting in painful deformity and immobility in the fingers, wrists, feet, and ankles.Systemic lupus erythematosus: The i<span>mmune system mistakenly attacks healthy tissue.</span>
