biodiversity and conservation
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Biodiversity and Conservation . Prokaryota : A Kingdom Divided. Archaea Possible oldest forms of life Extremophiles Live in high temps, pH, salinity Bacteria Live pretty much everywhere…even all over and inside you Features: No nucleus ; have nucleoid ( ball of DNA ) - PowerPoint PPT PresentationTRANSCRIPT
Biodiversity and Conservation
Prokaryota: A Kingdom Divided1) Archaea– Possible oldest forms of life– Extremophiles
• Live in high temps, pH, salinity
2) Bacteria– Live pretty much everywhere…even all
over and inside you• Features:– No nucleus; have nucleoid (ball of DNA)– Circular chromosome/ plasmids– No-membrane bound organelles
• Mitochondria, Goli, etc…– Small ribosomes– Most are unicellular
Protoctista• Group of leftovers• Anything eukaryote that is
not really a plant, fungi, or animal is a protoctist
• Features:– Eukaryotic; have a nucleus and
membrane-bound organelles– Mostly unicellular– Animal-like; no cell wall and
heterotrophs (eat things)– Plant-like; photosynthetic
Fungi• Look like plants but do not
act like plants• Do NOT do photosynthesis;
they are heterotrophs• Features:– Eukaryotic– Unicellular or multicellular– Spore reproduction cycle– Cell walls BUT made of chitin
not cellulose– Never have cilia/flagella
Plantea• Look like plants because they
are…• Features:– Multicelluar eukaryotes– Do photosynthesis;
autotrophes– Cell walls made from cellulose– Some parts can have flagella
Animalia• Don’t look like plants
because they aren’t…• Okay, sometimes they look
like plants• Features:– Multicellular eukaryotes– Heterotrophes; no
photosynthesis– No cell walls; full motion
bodies– Some cells have cilia/flagella
Breakdown ReviewProkaryotic Eukaryotic
• Prokaryota • Protocista• Fungi • Plantae• Animalia
Autotrophic Heterotrophic
• Protocista• Plantae
• Prokaryota• Protocista• Fungi• Animalia
This Island “Earth”• What are the limiting factors on an
island?– Space, food, fresh water…
• The Earth is an closed system:– Energy is exchanged but matter is not
exchanged– The resources on the Earth are limited
• Most population are kept under control by natural limits on growth– Food, space, competition, predation,
disease…• Humans have developed a new way to
live by taking control of our environment
• Since nature cannot complete control our growth, it is our responsibility to do it ourselves
Humans Take Control• What is man’s greatest invention?
– Agriculture• Growing our own food means we
are not limited by nature as much• What happened after agriculture
started?1) Society formed jobs, hierarchy,
and economics are born2) Cities are created to increase trade
and wealth3) Suburbs grew from cities (urban
sprawl) because they are safer and cleaner
4) Cities fall apart (urban decay) and humans expand outward into nature
Rapid Growth• What major moments promoted
the sudden jumps in human population?
1) Industrial Revolution major growth in industry created more money, more jobs, and better education
2) Understanding Medicine money and growth gives us the resources to improve science which lead to better medicine and longer lifespans
3) Computer Age computers take technology/science to a place never thought possible and society raises its standard of living
Too Much of Everything• Why is a growing population
AND higher standards the path to uncontrolled environmental damage?
1) More food is needed people want meat but 5lbs of wheat is needed to make 1lb of meat
2) More technology built on rare elements that will get harder to find forcing us to dig deeper into the Earth
3) More energy both 1 and 2 mean more energy is needed for each person to live the life they want
What is the Answer?• Sustainable Development
– Society must balance growth with the resources that are available, growth in society, and growth in the economy
• 2 types of resources:1) Renewable resources can be
replaced in a short length of time– Trees, animal populations,
alternative forms of energy…2) Nonrenewable resources can
be replaces but will take longer than society can wait– Coal, oil, natural gas, rivers/lakes
Group Discussion• Break up into 3 groups• Read the question and
discuss • Write down your
thought and be prepared to explain your answers to the class
Discussion Questions• Group 1:– In what countries is sustainable development most
important? Explain why.• Group 2:– How might you stop or slow down the growth of cities
as more and more people move to cities looking for work?
• Group 3:– Do you think governments/society should limit the
excess to meat products since raising animals has such a negative impact on an environment? Why?