Transcript BIOLOGY - Bishop Ireton High School

BIOLOGY
UNIT 1
CHARACTERISTICS
OF
LIVING THINGS
ORGANIZATION
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All living things have 1 or more cells.
More complex organisms group their cells to
increase the level of function.
Cells Tissue
Organism
Organ
Systems
REPRODUCTION
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2 types: Asexual(Bacteria) and Sexual (Plants)
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Need to produce fertile offspring
Prevent extinction
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GROWTH and DEVELOPMENT
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Increase amount of material
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Differentiation-specialized cells and
organs
Metamorphosis (butterfly)
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Obtain and Use Energy
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Obtain energy from environment
Anabolism: synthesis (uses energy)
Catabolism: break down (produces energy)
Metabolism= Anabolism +Catabolism-sum
total of energy production and usage
What is the “Energy “ we keep referring to?
ATP
Response to Environment
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STIMULUS- anything that causes organism to
react
Response- response to stimulus
HOMEOSTASIS- regulation of an organism’s
internal environment that is suitable to survival
(ex. Sweating vs. shivering)
SCIENTIFIC METHOD
SCIENTIFIC METHOD
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Common steps that scientists use to gather
information and answer questions
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Start by stating a possible answer to a
question- HYPOTHESIS
Test Hypothesis with EXPERIMENT
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Designing an Experiment
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Have 2 groups- Control and Experimental
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Control group- standard or normal (no
changes)
Experimental group- change ONE variableother wise you won’t know what is causing
change in the experimental group
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Variables
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Independent(manipulated)- the one scientist
changes
Dependant(responding)- outcome that scientist
measures
EX.- Grow 2 plants in soil. One receives water,
the other doesn’t. Measure growth by height
Independent variable?
Amount of water
Dependant variable?
Height
SET UP EXPERIMENT
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Constants- variables that are the same for
both the control group and experimental
group
Make observations
Collect Data
2 typesQuantitative- numbers (objective)
Qualitative- observations (subjective)
 Compile
Results
 Form Conclusion
 Follow up- make revisions
 Theory-
hypothesis supported by
large body of scientific evidence.
 Laws- ideas that are known to be true
(gravity)
Lab Safety
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No food or gum
Goggles/gloves if required
No goofing off!
Handle specimens with care-Humanely!!
Come prepared!