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Questions and Answers
Which characteristic of life involves the ability to respond to changes in the environment?
Which characteristic of life involves the ability to respond to changes in the environment?
- Growth and development
- Maintaining homeostasis
- Acquiring and using energy
- Response to stimuli (correct)
In the scientific method, which step directly follows the formulation of a hypothesis?
In the scientific method, which step directly follows the formulation of a hypothesis?
- Collect data
- Conduct research
- Analyze and conclude
- Conduct an experiment (correct)
What distinguishes a control group from an experimental group?
What distinguishes a control group from an experimental group?
- The experimental group has no variables changed.
- The control group is tested for the variables in the hypothesis.
- The experimental group serves as a benchmark for comparison. (correct)
- The control group receives the treatment being tested.
Which of the following is NOT a method for organizing data collected from research?
Which of the following is NOT a method for organizing data collected from research?
In an experiment, which variable is manipulated by the researcher?
In an experiment, which variable is manipulated by the researcher?
Flashcards
Homeostasis
Homeostasis
The ability of an organism to maintain a stable internal environment despite external changes.
Stimulus
Stimulus
Any change in the environment that an organism responds to.
Hypothesis
Hypothesis
A testable prediction that explains or predicts an observation.
Independent Variable
Independent Variable
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Dependent Variable
Dependent Variable
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Study Notes
Unit 1: Introduction to Biology
- Biology is the study of life, from the simplest (unicellular) to the most complex (multicellular) forms.
Characteristics of Life
- All living things share seven characteristics:
- Made up of cells (unicellular or multicellular)
- Grow and develop
- Acquire and use energy
- Reproduce
- Maintain homeostasis
- Respond to stimuli
- Evolve as a population
Scientific Method
- The scientific method involves these steps:
- Identify a problem or question
- Conduct background research
- Formulate a hypothesis
- Design and conduct an experiment
- Collect data
- Analyze the data
- Draw conclusions
- (Optional) Peer review.
Variables in Experiments
- Independent variable: The factor intentionally changed in the experiment's setup
- Dependent variable: The factor measured as a result of the change in the independent variable.
- This can be quantitative (numerical data) or qualitative (descriptive data).
Control vs. Experimental Groups
- A control group does not receive the treatment or change being tested. It is used for comparison to see if a treatment had an effect
- An experimental group receives the treatment or change being tested
Data Organization
- Data can be organized in various ways:
- Bar graphs
- Line graphs
- Scatter plots
- Pie charts
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