Notesale: Turn your study into money

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❖ Reproduction (asxually or sexually
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❖ Cells are organized
❖ Responds to stimuli
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❖ Have the capacity to adapt
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❖ Metabolism- All of the chemical reactions that occur in a cell
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❖ Reproduction- An organism makes more of itself
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Responds to stimuli:
❖ Behavior- Is meant to minimize injury, help in acquiring food, and reproducing
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Adaption:
❖ Adaptations- are the features that make organisms better suited for their environment
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❖ Evolution- the change in frequency of traits in a population and species
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Cell- The smallest unit of life
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Tissue- a group of similar cells that perform a particular function
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Organ- several tissues joined together
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Organ system- organs working together
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Organism- an individual who is a collection of multiple organ systems
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Species- a group of interbreeding organisms
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Population- all members of one species
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Community- the interaction between populations
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Ecosystem- community of populations interacting with the physical environment
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Biosphere- All of Earth's ecosystems
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2 The Classifications of Organisms
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❖ Systematics- the study of the evolutionary relationship between species
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Domains:
❖ Domain Archaea
➢ Found in aquatic environments that are without oxygen, really salty, really hot, or too
acidic for most other organisms
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❖ Domain Bacteria
➢ Found almost everywhere on earth
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Eukaryotic supergroups and kingdoms
❖ Protists
➢ Can be single celled

➢ Some use photosynthesis and some acquire their own food
➢ Examples: Algae, protozoans, and water molds
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❖ Fungi
➢ Helps decompose
❖ Animals
➢ multicellular
➢ Ingest and process their food
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❖ Scientific method
➢ A standard series of steps used in gaining new knowledge that is widely accepted among
scientists
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❖ Hypothesis
➢ A possible explanation for a natural event
➢ Is not merely a guess, rather an informed statement that can be tested
❖ Experiment
➢ A series of procedures used to test a hypothesis
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➢ Involves the “if, then” logic
❖ Prediction
➢ An expected outcome
❖ Experimental design
➢ The manner in which a scientist intends to conduct an experiment
❖ Experimental variable (independent variable)
➢ Factor of the experiment being tested
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❖ Model
➢ Allow scientists to control specific variables and environmental conditions in a way that
may not be possible in the natural environment
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➢ Can be tables or graphs
❖ Theories
➢ Concepts that join together well supported and related hypotheses
❖ Principle/Law
➢ Theories that are generally accepted by an overwhelming number of scientists
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4 challenges facing science
❖ Technology- the application of scientific knowledge to the interests of humans
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❖ Global warming- the increased amount of carbon dioxide in the atmosphere that causes the
temperature rise
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❖ Extinction- is the death of a species or larger classification category
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Examples: avian influenza and SARS
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Eamples: Ebola

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