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1.     A population of grasshoppers in the Kansas prairie has two color phenotypes, green and brown. Typically, the prairie receives adequate water to maintain healthy, green grass. Assume a bird that eats grasshoppers moves into the prairie. How will this affect natural selection of the grasshoppers? How might this change in a drought year?

 

 2.     You are a writer for “Consumer Reports” magazine and you are asked to design an experiment to evaluate the effectiveness of three brands of whitening strips for teeth. Describe how you would do this using the Scientific Method. Include all of the steps, controls and variables.

 

 3.     Viruses are not considered to be living organisms.  Name 4 characteristics you could identify to distinguish living organisms from viruses.

 

 

 

 4.     Explain the process of cell division in animals. Include a description of

 

interphase, mitosis and cytokinesis.

 

 

5.     Suppose someone presented data from their research that showed the DNA of a newly discovered species was composed of: 30% adenine, 30% guanine, 20% thymine, 20% cytosine. Based on what you know about DNA structure, explain why these data do not make sense.

 

 

6.     What are the differences between a covalent bond and an ionic bond?

 

 

7.     Water is crucial for life as we know it. One of the most important characteristics of water is its ability to act as a solvent. Explain why water is such a good solvent for polar and charged molecules.

 

 

8.   Suppose you are taking a cruise from California to Hawaii. About halfway there, the ship begins to sink. You are able to board a lifeboat, but now you are floating in the ocean waiting to be rescued. After several days, you are so thirsty that you bend over the side of the boat and drink lots of salty seawater. Explain what you think will happen to your body within a few hours of drinking the ocean water, and explain biological basis for your reaction.                     

 

 9.   What is DNA fingerprinting and explain how this could be used in court or on a TV show such as CSI?

 

 

10.   DNA and RNA are similar yet distinct components of the cell. Describe three differences between RNA and DNA with respect to their chemical composition and structure. Provide a detailed description of each characteristic you chose  in your response.

 

 

11.  Why would you quickly die if not for the action of enzymes in your cells?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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