Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 1, Problem 15TYK

Apply Evolutionary Thinking When a biologist first tested a new pesticide on a population of insects, she found that only 1% of the insects survived their exposure to the poison. She allowed the survivors to reproduce and discovered that 10% of the offspring survived exposure to the same concentration of pesticide. One generation later, 50% of the insects survived this experimental treatment. What is a likely explanation for the increasing survival rate of these insects over time?

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Kettlewell's experiment is included in most biology texts as an example of evolution How do we know that the moths evolved?
Write a hypothesis that answers our scientific question: How does the solution change the volume of an egg cell?   Be sure to be specific about the parts of the experiment. Include the variables in your response. How does the concentration of the syrup solution change the volume of an egg cell? Use this sentence starter for a guide: If the [independent variable] [increases/decreases] then the [dependent variable] will [increase, decrease, stay the same] because [insert what you think you understand about biology].
FOR THE FOLLOWING STUDIES, WRITE A NULL HYPOTHESIS.-You want to test whether birth control pills increase a woman’s chances of getting breast cancer.  -You are interested in discovering if cattle grazing in grasslands alters the plant species that grow in those grasslands. -You want to study whether tomatoes are grown organically (without chemical pesticides and fertilizers) have greater vitamin content than tomatoes grown conventionally (with chemical pesticides and fertilizers).
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