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To which of the following domains of life do humans belong?
To which of the following domains of life do humans belong?
To which of the following domains do unicellular organisms, which lack nuclei, belong?
To which of the following domains do unicellular organisms, which lack nuclei, belong?
New scientific knowledge is gained through a multistep process known as:
New scientific knowledge is gained through a multistep process known as:
What is the dependent variable in an experiment testing the effect of a new medication on blood cholesterol levels?
What is the dependent variable in an experiment testing the effect of a new medication on blood cholesterol levels?
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A broad hypothesis that has been supported by repeated experimentation is known as:
A broad hypothesis that has been supported by repeated experimentation is known as:
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Study Notes
Classification of Organisms
- Humans belong to the domain Eukarya.
- Unicellular organisms that lack nuclei belong to the domains Archaea and Bacteria.
Scientific Method
- The scientific method is a multistep process that helps gain new scientific knowledge.
- It involves hypothesis development, observation, experimentation, and prediction.
Experiment Design
- An experiment is designed to test the effect of a new medication on the level of cholesterol in the blood.
- The experimental subjects are divided into two similar groups, one receiving the medication and the other a placebo.
- The dependent variable is the level of cholesterol in the subjects' blood.
Hypothesis and Theory
- A broad hypothesis that has been supported by repeated experimentation is known as a theory.
- A hypothesis is developed using observations and inductive reasoning.
Biology
- The smallest unit of life that demonstrates all the properties of life is a cell.
- All the organisms that occupy a specific area, such as a college campus, are considered a community.
- A community and its environment together form an ecosystem.
Graphing
- The independent variable is usually plotted on the x-axis of a graph.
Scientific Hypothesis
- An acceptable scientific hypothesis can be tested and can be proven false.
- A hypothesis should be specific and measurable.
Experiment Considerations
- In designing an experiment, it is essential to consider factors such as participant selection, group size, and control groups.
Anecdotal Evidence
- Anecdotal evidence is based on personal experiences and is not a reliable source of scientific evidence.
Homeostasis
- The maintenance of a relatively stable internal environment is known as homeostasis.
Human Characteristics
- Humans are distinguished from other animals by features such as bipedalism, large brain, and capacity for complex language.
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Description
Take this quiz to test your knowledge of biology concepts, with answers available in the Appendix.
