Question 1 (10 points) T. J. saw a commercial that claimed covering a cut with an adhesive bandage will help the wound heal faster. He decides to design an experiment to test this claim. For his experiment, T. J. finds two friends with cuts on their hands. One friend covers her cut with an adhesive bandage, while the other leaves his cut uncovered. They make observations about each cut every morning until they both heal. If the wound that was covered with the adhesive bandage heals in less time than the one that was not covered, T. J. will conclude that using an adhesive bandage helps a wound heal faster. (10 points) (a) Identify THREE variables that were not specifically controlled in the experimental design.
(b) For each of these variables, describe how they might have affected the outcome of T. J. 's experiment.
(c) For each of the variables listed, suggest a way to better control them if the experiment were to be repeated.

1. this system transports blood through the body and heart. 2. this system relates to the process by which an organism gets rid of its waste. 3.this system is responsible for movement of bones and fluids throughout the body. 4. this system receives and transmits information and responses. it depends upon electrical impulses created by the movement of charged particles. 5. this system relates to the process by which an organism replicates. sexually reproduction usually involves male cells (sperm) meeting female cells (eggs) to produce a fertilized egg or zygote. 6. this system gets oxygen to the cells of the body and rids the body of waste gases. some organisms use their skin. this is also a cell-level process. 7. this system relates to the structure and support of an organism. it is made of salts and proteins and found in vertebrate animals. 8. this is the system of organs which circulate blood around the body of most animals. 9. this system controls the glands that secrete hormones. 10. this organ system to protect the body from damage. itembank : system circulatory digestive system endocrine system excretory integumentary system muscular system nervous system reproductive system respiratory system skeletal system cardiovascular system