Characteristics of Life - Norwell High School · Living things arise from living things through...
Transcript of Characteristics of Life - Norwell High School · Living things arise from living things through...
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October 20, 2015
Characteristics of Life
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What characteristics do all living things share?
Where do living things come from?
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Slime mold: Is it living or nonliving?
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All Living Things...Organized - (cell organization)
Grow and DevelopReproduce
Respond to stimuliMaintain stable internal conditions
(homeostasis)Use Energy
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Organism
Living things that have all the characteristics of life.
Examples: human, cat, dog, insect, plant
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How did living things differ from non-living things?
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Cellular Organization
cell
the basic unit of structure and function in an organism.
to see most cells you need a microscope
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Unicellular
Single-celled organisms; organisms made up of only one cell.
Example: Bacteria
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Multicellular
Organisms composed of many cells.
In multicellular organisms, the cells are specialized to do certain tasks.
Example: muscle cells and nerve cells in the human body
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Growth and Development
Growth is the process of becoming larger.
Development is the process of change that occurs during an organism's life to produce a more complex organism.
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Reproduction
The ability to reproduce, or produce offspring that are similar to the parents.
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Living things arise from living things through reproduction.Spontaneous generation - the mistaken idea that living things
can arise from nonliving sources.
Francisco Redi helped disprove spontaneous generation by designing a controlled experiment.
Controlled Experiment - two tests that are identical in every respect except for one factor.
Life Comes From Life
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Response
An action or change in behavior.
stimulus response
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Response to surroundingsStimulus
A change in an organism's surroundings that causes the organism to react.
Examples: Changes in temperature, light, and sound
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Internal stimuli
Example:
Stimulus: Your stomach growls
Response: You get food and eat it
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External stimuli
Example:
Stimulus: Light is turned on
Response: You shield your eyes/squint from the light change
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Stable Internal Conditions
Homeostasis
The maintenance of stable internal conditions.
Example: sweating helps our bodies maintain a steady body temperature
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Energy
The cells of living organisms use energy to perform activities such as to grow and repair
injured parts.
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autotrophs
(auto- means "self" and -troph means "feeder")
Organisms that use the food they make to carry out their own life functions.
example: plants
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heterotrophs
(hetero- means "other" and -troph means "feeder")
Organisms that obtain their energy by feeding on others.
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Quiz Making Competition
Task: Create a quiz AND answer key.
Requirements - 10 questions (must include ALL vocab in all 10 questions)
- 2 multiple choice questions
- 2 open response questions
- other questions can include fill in the blank, matching, and fix the vocabulary error (TRUE/FALSE)
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Review
1.) How do growth and development differ?
2.) What is homeostasis?
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