Biology Exam Review.

Biology Exam Review.1.Which of the following statements about the image shown below is NOT an observation? - answersc. The insects pattern shows that it is poisonous. 2. The statement "The worm is 2 cm long" is an... - answersa. observation 3.An inference is... - answersb. a logical interpretation of an observation. 4. To be useful in science, a hypothesis must be... - answersc. testable. 5. Which of the following statements about a controlled experiment is true? - answersb. only one variable is tested at a time. 15. A skeptical attitude in science... - answersc. means a new idea will only be accepted if it is backed by evidence. 16. The purpose of peer review in science is to ensure that... - answersd. published results meet standards set by the scientific community. 17. A scientific theory is... - answersb. a well-tested explanation that unifies a broad range of explanations. 23. The process in which 2 cells from different parents unite to produce the first cell of a new organism is called... - answersd. sexual reproduction. 24. The process by which organisms keep their internal conditions relatively stable is called... - answersd. homeostasis 6. What are the goals of science? - answersThe goal of science is to provide natural explanations for events in the natural word. 7.How does an observation about an object differ from an inference about that object? - answersAn inference is an interpretation while an observation is what is noticed. 8.How does a hypothesis help scientists understand the natural world? - answersIt is base for an experiment.(a place to start). 9.Why does it make sense for scientists to test just one variable at a time in an experiment? - answersIf several variables were changed then scientists would not know which one variable changed the experiment. 10.Distinguish between an experimental group and a control group. - answersA control group is exposed to the same conditions as the experimental group except for 1 independent variable. 11.What steps are involved in drawing a conclusion? - answersinitial observation, hypothesis, experiment, observation/analysis of data, Interpretation,final hypothesis supported, finally draw a conclusion 12.How can a graph of data be more informative than a table of the same data? - answersGraphs can show a piece of information compared to another piece (like in a pie chart) Easier to see patterns, a table it is harder to see comparisons. 13.Suggest an experiment that would show whether one food is better than another at speeding an animal growth. - answerspeanut butter is better than ice cream because peanut butter has protein. food, weight, growth, & activity level. 18.Why are scientific theories useful? - answersIt is describing a well-tested explanation. 19.Why aren't theories considered abosolute truths? - answersScience is always changing, a theory is always changing and may be revised or replaced. 25.How are unicellular and multicellular organisms alike? How are they different? - answersBOTH