BIOL 133 Week 1 Chapter 1 - Question and Answers (VERIFIED)

1. A decrease in blood water levels is detected in the brain. The brain sends signals to the pituitary gland to release hormones that communicate with the kidney to reabsorb water, which will increase blood water levels. This represents what life property? 2. When a sperm uses chemical signals to navigate the swim towards the egg, it is positive response. This is a form of 3. When the brain, spinal cord and nerves of the body communicate with each other, it represents the _______________ level of organization. 4. Based on levels of organization, which example represents the broadest level? 5. What sequence increases in complexity for levels of biological organization? 6. The integumentary system is composed of skin, hair, nails and glands. The skin contains areolar tissue. Areolar tissue contains fibroblast and macrophage cells. What characteristic of life does this represent? 7. Which is an example of a hypothesis that can explain the observation, flashlight does not work? 8. Place the steps of the scientific method in order from beginning to end. 9. Which discipline would one practice if studying the development of zygotes (fertilized eggs) in mammals? 10. An experiment tested the health effects of a nutritional supplement by the following procedure: People were asked to choose to join the experimental group or the control group. People in the experimental group were given the supplement added to a pink, strawberry-flavored drink. People in the control group were given a glass of water. One hour later, the people were asked “Do you feel better?” How would you improve the experimental protocol? (Select all necessary changes.)