BIO 189 Exam 1 Ch.1-3 questions and answers A+ Grade
2026\2027
anecdotal evidence
- correct answer •an informal observation that has not been systematically tested
•can be second hand knowledge
independent variable
- correct answer the variable, or factor, being deliberately changed in the experimental group
correlation
- correct answer a consistent relationship between two variables
*CORRELATION DOES NOT IMPLY CAUSATION
peer review
- correct answer a process in which independent scientific experts read scientific studies b4 they are
published to ensure that the authors have appropriately designed and interpreted the study
epidemiology
- correct answer the study of patterns of disease in populations, including risk factors
placebo
- correct answer A fake treatment given to control groups to mimic the experience of the experimental
groups.
experimental group
- correct answer the group in an experiment that experiences the experimental intervention or
manipulation
,randomized clinical trial
- correct answer a controlled medical experiment in which subjects are randomly chosen to receive
either an experimental treatment or a standard treatment (or a placebo)
•One way to avoid sample population bias
hypothesis
- correct answer a tentative explanation for a scientific observation or question
control group
- correct answer the group in an experiment that no experimental intervention or manipulation
dependent variable
- correct answer the measure result of an experiment, analyzed in both the experimental and control
groups
experiment
- correct answer a carefully designed test, the results of which will either support or rule out a
hypothesis
falsifiable
- correct answer describes a hypothesis that can be ruled out by data that show that the hypothesis
does not explain the observation
sample size
- correct answer the number of experimental subjects or the number of times an experiment is
repeated. In human studies, sample size is the number of participants
science
- correct answer the process of using observations and experiments to draw conclusions based on
evidence
scientific theory
- correct answer an explanation of the natural world that is supported by a large body of evidence and
has NEVER been disproved
, statistical significance
- correct answer a measure of confidence that the results obtained are "real" and not due to chance
^ samples and ^ time spent = ^significance
testable
- correct answer describes a hypothesis that can be supported or rejected by carefully designed
experiments or observational studies
What P value is significant?
- correct answer Less than .05
acid
- correct answer A substance that increases the hydrogen (H+) ion concentration of solutions
matter
- correct answer anything that takes up space and has mass
amino acid
- correct answer the building block, or monomer, of a protein
metabolism
- correct answer all the chemical reactions taking place in the cells of a living organism that allow it to
obtain and use energy
base
- correct answer •a substance that reduces the H+ ion concentration of solutions
•Any compound that increases the number of hydroxide ions when dissolved in water
molecule
- correct answer atoms linked by covalent bonds
2026\2027
anecdotal evidence
- correct answer •an informal observation that has not been systematically tested
•can be second hand knowledge
independent variable
- correct answer the variable, or factor, being deliberately changed in the experimental group
correlation
- correct answer a consistent relationship between two variables
*CORRELATION DOES NOT IMPLY CAUSATION
peer review
- correct answer a process in which independent scientific experts read scientific studies b4 they are
published to ensure that the authors have appropriately designed and interpreted the study
epidemiology
- correct answer the study of patterns of disease in populations, including risk factors
placebo
- correct answer A fake treatment given to control groups to mimic the experience of the experimental
groups.
experimental group
- correct answer the group in an experiment that experiences the experimental intervention or
manipulation
,randomized clinical trial
- correct answer a controlled medical experiment in which subjects are randomly chosen to receive
either an experimental treatment or a standard treatment (or a placebo)
•One way to avoid sample population bias
hypothesis
- correct answer a tentative explanation for a scientific observation or question
control group
- correct answer the group in an experiment that no experimental intervention or manipulation
dependent variable
- correct answer the measure result of an experiment, analyzed in both the experimental and control
groups
experiment
- correct answer a carefully designed test, the results of which will either support or rule out a
hypothesis
falsifiable
- correct answer describes a hypothesis that can be ruled out by data that show that the hypothesis
does not explain the observation
sample size
- correct answer the number of experimental subjects or the number of times an experiment is
repeated. In human studies, sample size is the number of participants
science
- correct answer the process of using observations and experiments to draw conclusions based on
evidence
scientific theory
- correct answer an explanation of the natural world that is supported by a large body of evidence and
has NEVER been disproved
, statistical significance
- correct answer a measure of confidence that the results obtained are "real" and not due to chance
^ samples and ^ time spent = ^significance
testable
- correct answer describes a hypothesis that can be supported or rejected by carefully designed
experiments or observational studies
What P value is significant?
- correct answer Less than .05
acid
- correct answer A substance that increases the hydrogen (H+) ion concentration of solutions
matter
- correct answer anything that takes up space and has mass
amino acid
- correct answer the building block, or monomer, of a protein
metabolism
- correct answer all the chemical reactions taking place in the cells of a living organism that allow it to
obtain and use energy
base
- correct answer •a substance that reduces the H+ ion concentration of solutions
•Any compound that increases the number of hydroxide ions when dissolved in water
molecule
- correct answer atoms linked by covalent bonds
