Download bacteria and science processes

Biology 11: Bacteria
Use your unit test and this study guide to identify important material to review.
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Characteristics of Bacteria
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oldest and most abundant group of organisms
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procaryotes - most unicellular - some live in colonies
Bacteria classified by shape - describe the shape of the following
a. cocci
b. bacilli
c. spirillum
Draw the bacterial structures that would be visible under electron microscope and compare to the structures
present in a virus.
Nutrition - define
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aerobes vs. anaerobes
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decomposers
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pathogens
Reproduction: describe
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binary fission
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conjugation
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endospores
Ecological role of bacteria
 Describe the role of bacteria as decomposers
 Describe 2 ways bacteria can be useful and 2 ways bacteria can be harmful
 Describe 3 ways that harmful bacteria can be controlled.
Bacterial resistance to antibiotics - what is an antibiotic?
Explain how bacteria can develop resistance to antibiotics and why this can be dangerous.
Science Processes
Describe and use the following components of an experiment. Think of an experiment that you have done in class
and describe each of the following aspects of that experiment.
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Question - Starting point for experiment – what you are looking to find out.
Hypothesis – IF independent variable changes THEN the dependent variable should … BECAUSE
Control group – used as a comparison in the experiment to see if the independent variable is what caused
changes to dependent variable
Controlled variables – stay the same throughout the experiment
Independent variable – what is intentionally changed by the experimenter
Dependent variable – what changes as a result of independent variable
Reliable data – when experimenter has confidence in data after many tests
Conclusion 1 – Describes what the data shows in relation to the experimental question. Does the data support
or refute the hypothesis
Conclusion 2 – a discussion about possible experimental error and confidence in data
Given data, produce a graph that shows the following:
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Labelled X axis – independent variable
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Labelled Y axis – dependent variable
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Title – what is being graphed
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Line of best fit (when applicable – to show a trend when there might be experimental error)