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1-1 Themes of Biology Objectives: 1. Relate the 7 properties of life
to living organisms. 2. Describe 7 themes that can
help you organize what you learn about Biology.
3. Identify the tiny structures that make up all living organisms.
4. Differentiate between reproduction and heredity and between metabolism and homeostasis.
http://www.bio.miami.edu/~cmallery/150/life/cartoon.origins.jpg
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What is living?
Object yes no Mouse Kleenex Cactus Coral Dust pan Bacteria in petri dish
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What are the characteristics that make them alive?
Partner Brainstorm… Group list…. Record…
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1. Cellular Structure and Function All living things are made
of one or more cells. CELLS are highly
organized tiny structures with thin coverings called membranes.
Prokaryotic vs. Eukaryotic
*your body is made of about 100 trillion cells
http://www.coloncancerresource.com/image-files/colon-cancer-cell-diagram.jpg
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Prokaryotic vs. Eukaryotic Cells
/Prokaryote_cell_diagram_pt.svg/573px-Prokaryote_cell_diagram_pt.svg.png
http://upload.wikimedia.org/wikipedia/commons/thumb/d/db/Prokaryote_cell_diagram_pt.svg/573px-Prokaryote_cell_diagram_pt.svg.png
http://scienceblogs.com/clock/upload/2006/11/a2%20animal%20cell.png
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What is the difference?
1. Size – Prokaryotic cells are smaller 2. Nucleus- Only found in Eukaryotic cells 3. Membrane bound organelles – Only found in Eukaryotic cells
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2. Reproduction All living things can reproduce. It is the process by which
organisms make more of their kind from one generation to the next
Humans = 9 months, bacteria = 15 minutes
Asexual = bacteria divide to reproduce, do not require a mate but offspring are identical to parent
Sexual = 2 organisms produce offspring that have a variety of traits
http://www.emc.maricopa.edu/faculty/farabee/BIOBK/1-OLIH023P.GIF (top image)
http://z.about.com/d/biology/1/0/_/2/eggsperm.jpg
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3. Metabolism Living organisms perform
chemical reactions in order to obtain energy to run the processes of life
It is the sum of all chemical reactions carried out by the organism.
hummingbird vs. sloth – Fast vs. slow rate
Some organisms have the ability to regulate through hibernation/dormancy
http://www.elmhurst.edu/~chm/vchembook/images/590metabolism.gif
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4. Homeostasis All living organisms must
maintain a stable internal environment in order to function properly.
Stasis = state/condition Homeo/homo = same/
steady Homo sapiens regulate… Temperature, heart rate,
respiratory rate, digestive function, muscle contraction, balance, state of consciousness,etc, etc.
http://tribalglobe.com/TG/wp-content/uploads/2009/04/11971-1.jpg
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5. Heredity All living things are able to
pass on their characteristics (traits) to their offspring through genes that are passed from parent to offspring each generation.
Genes = sets of inherited instructions for making proteins/regulating traits
Mutations = change in the genes (DNA) which may alter the instructions – Some are bad, but may
be good… http://bg.imim.es/~nlopez/teaching/MScBioinfo2005/GenesDisease/heredity.gifhttp://www.accessexcellence.org/RC/
VL/GG/images/mutation.gif
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6. Evolution Populations of living
organisms respond to the environment they exist in.
This adaptation can result in changes to the species genes over time.
Change in inherited traits of species over time is evolution.
Species = group of gentically similar organisms that can produce fertile offspring.
Horse…donkey….mule…. http://extra.listverse.com/amazon/evolution/
evolution_of_whales.jpg
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7. Interdependence/Responsiveness Organisms in a biological
community interact with and affect each other.
They are dependent on one another and their environment = inter - dependent
They grow and survive as a result of finding their niche in the community in which they exist.
http://susty.com/image/ecosystem-diagram-wedged-tailed-eagle-kookaburra-bird-rabbit-mouse-grass-snake-grasshopper-food-web-
illustration-arrows-image.gif
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Is this organism alive?
Mouse Tree Virus 1. Cells 2. Reproduce 3. Metabolism 4. Homeostasis 5. Heredity 6. Respond/ 7. Grow
http://www.google.com/imgres?imgurl=http://www.ifpma.org/Influenza/content/images/diagram_virus.jpg&imgrefurl=http://www.ifpma.org/Influenza/index.aspx%3F000_The_Influenza_Virus/001a_Influenza_Virus.html&usg=__GIpFC8TLRVS1s3MWwOWQ5NOl-
W4=&h=565&w=600&sz=72&hl=en&start=2&tbnid=Jpjya0YQha0WTM:&tbnh=127&tbnw=135&prev=/images%3Fq%3Dvirus%26ndsp%3D18%26hl%3Den%26sa%3DG
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