The Study of Life Bio logy (Greek) LifeStudy of But what is life??? .
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Transcript of The Study of Life Bio logy (Greek) LifeStudy of But what is life??? .
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The Study of Life
Bio logy (Greek)
Life Study of
But what is life???http://www.youtube.com/watch?v=juxLuo-sH6M&noredirect=1
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What are some examples of living things?
Humans Plants Insects Mold Bacteria
What about these things?Rocks, bicycles, books
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Biologists have created a list of characteristics by which we can recognize living things
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All living things…..All living things…..
1.1. Are made of one or more Are made of one or more CellsCells
2.2. ReproduceReproduce
3.3. Obtain and Obtain and Use EnergyUse Energy
4.4. RespondRespond to their Environment to their Environment
5.5. GrowGrow and and DevelopDevelop
6.6. AdaptAdapt Through Evolution Through Evolution
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CellsCells are basic structural units of are basic structural units of life. life. Smallest unit capable of all Smallest unit capable of all life life functions. functions. Cells are the building blocks of Cells are the building blocks of all all organismsorganisms = living things. = living things.
http://web.jjay.cuny.edu/~acarpi/NSC/13-cells.htm
http://micro.magnet.fsu.edu/cells/plantcell.html
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Two types of Organisms:Two types of Organisms:
UnicellularUnicellular Organisms Organisms
Entire organism is Entire organism is made up of made up of oneone single single cellcell
Bacteria and protistsBacteria and protists
http://blogs.discovermagazine.com/loom/2010/03/04/i-for-one-welcome-our-microbial-
overlords/http://www.lanesville.k12.in.us/lcsyellowpages/tickit/carl/bacteria.html
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UniCellular
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Multicellular Multicellular OrganismsOrganismsThe organism is The organism is made up of many made up of many cellscells
Cells have Cells have specialized functions specialized functions within the organismwithin the organism
Epithelial cells (like inside your cheek)http://www2.sunysuffolk.edu/pickenc/BY30%20Histology.htm
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MultiCellular
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ReproductionReproduction is the process of producing new organisms is the process of producing new organisms of the same type. of the same type.
Asexual Asexual ReproductionReproduction
OneOne parent parent organism reproducing organism reproducing by itselfby itself
SexualSexual ReproductionReproduction
TwoTwo different parent different parent organisms contribute genetic organisms contribute genetic information information
Involves the combination Involves the combination of of malemale and and femalefemale sex cells sex cells
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Asexual
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Sexual: a new genetic combination
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Living organisms need energy to grow, Living organisms need energy to grow, develop, repair damage, and reproducedevelop, repair damage, and reproduce
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AnabolismAnabolism
The process of The process of building up building up complex substances complex substances from simpler substancesfrom simpler substances
Building up cells and cellular components
Photosynthesis
http://www.fourcroy.org/biology/chapters/05photoresp/02.html
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CatabolismCatabolism
The process of The process of breaking down breaking down complex complex substances into simpler substances to release substances into simpler substances to release energyenergy
DigestionDigestion
Cellular RespirationCellular Respiration
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3. All Living Things Obtain and 3. All Living Things Obtain and Use EnergyUse Energy
Metabolism: the sum total of all the chemical reactions in your body
Anabolism + Catabolism =Metabolism!!!
http://manet.illinois.edu/pathways.php
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Organisms react to stimuli:Organisms react to stimuli:
LightLight
TemperatureTemperature
OdorOdor
Sound Sound
GravityGravity
HeatHeat
WaterWater
PressurePressure
An example is a plant’s An example is a plant’s leaves and stems growing leaves and stems growing toward lighttoward light
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A stable state of conditions in the body that A stable state of conditions in the body that are necessary for lifeare necessary for life
Body temperatureBody temperature
Blood volumeBlood volume
pH balancepH balance
Water balanceWater balance
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Stable Interior
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Even though exterior conditions are changing
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Growth means to get Growth means to get biggerbigger in size in size
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Development involves a Development involves a changechange in the physical form in the physical form or make-up of an organismor make-up of an organism
Example: Frog metamorphosis A frog begins as a single cell in a
fertilized egg, then grows into a tadpole, and eventually into a fully grown frog.
http://www.dec.ny.gov/pubs/32885.html
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Development
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AdaptationAdaptationA process that enables organisms to become A process that enables organisms to become better suited better suited to to their environmenttheir environment
Species obtain adaptations through Species obtain adaptations through evolutionevolution over great over great periods of timeperiods of time
http://evolution.berkeley.edu/evolibrary/article/evo_51
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An Example of AdaptationAn Example of Adaptation
Desert plants have succulent waxy leaves and Desert plants have succulent waxy leaves and stems to store water and reduce water lossstems to store water and reduce water loss
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http://www.firstschoolyears.com/science/resources/games/ourselves/living/living.htm (sorting)
http://www.teachersdomain.org/resource/tdc02.sci.life.colt.alive//
http://www.youtube.com/watch?v=OvMBJZLEwFs&feature=related (movie)