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BSC 2010 Exam 1 Review Questions

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BSC 2010 Exam 1 Review Questions Describe how the characteristics of an organism differ from those of non-living thing . - ✔✔•Organisms acquire and use materials and energy. •Organisms actively maintain organized complexity. •Organisms perceive and respond to stimuli. •Organisms grow. •Organisms reproduce. •organisms, collectively, have the capacity to evolve. Nonliving objects may posses some of these attributes, but only life-forms can do it all. Give an example of a process in the human body that is regulated by homeostasis and expalin why maintaing homeostasis is necessary. - ✔✔Body temperature Homeostasis is necessary to sustain organization throughout a living organism. Which of the 3 domains contain only single, prokaryotic cells? Which of the 3 domains contain only eukaryotic organisms? - ✔✔a. Bacteria, Archaea b. Eukarya Which kingdoms are part of Domain Eukarya and which types of organisms does each of them contain? - ✔✔Protists, single cells Fungi, mushrooms, mold, mildew Plantae, plants Anamalia, animals What is the different between a scientific theory and theory as thought of in laymen's terms? - ✔✔A scientific theory is a general explanation of important natural phenomena developed through extensive and reproducible observations.It is assumed to be true unless proven false. A layman's theory is an idea based on observations that has not been proven true. Why is it important to use the scientific method? - ✔✔To ensure validity of the experiment. The effect of a new oral acne medicine is being tested on human volunteers. Volunteers are divided into 4 groups: Group 1 swallows a 25mg dose, group 2 swallows a 50mg dose, and group 3 swallows a 75 mg dose, and group 4 swallows a placebo (sugar pill with no effect) once a day for 3 weeks. After the allotted time, before-and-after photos of the volunteers are analyzed by counting the number of pimples on the faces of each of the volunteers. a.) State one possible hyopthesis for this experiment b.) Which group(s) is/are the experimental group(s)? Which group is/are the control group? c.) What is/ are the variables in this experiment? d.) Describe a possible factor (experimental or otherwise) which could lead to a false interpretation of the results. - ✔✔a.) Group 3 will have the least amount of pimples on their face because, they comsumed they most amount of acne medicine with in the three week time period to prevent acne. b.) Group(s) 1,2,3 are experimental group. Group 4 is the control group

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