You read a blog that states, 'A squid's eye has been perfectly designed to see in the dark depths of the ocean.' Draft a paragraph that responds to the blog's use of the phrase 'perfect design' by citing an example discussed in this chapter.
Taylor, Simon, Dickey, Hogan 10th Edition
Ch. 20 Unifying Concepts of Animal Structure and Function
Problem 12While driving your car over hilly terrain, you maintain a constant speed of 55 miles per hour. Write a short paragraph describing how this illustrates the concept of homeostasis.
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Key Concepts
Homeostasis
Feedback Mechanisms
Dynamic Equilibrium
In a study to examine the effectiveness of a new acne cream, participants were assigned to one of two groups: those who would be asked to use the cream for three months and those who would not use any treatment. Participants would be asked to keep a journal rating how bad they think their acne is on a scale of 1–10 each week. What are the well-designed aspects of this study? What are the limitations? How would you improve the design of this study to address these limitations?
After a long, hot run together, your friend tells you that you should dunk your head into a cooler of water to lower your body temperature more rapidly, rather than sitting and waiting to cool down. What do you think? Form a hypothesis about how the ice-cold water might affect the rate at which your body temperature returns to normal. How could you test your hypothesis?