BIO EVENTS
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Event7.pptxEvent 7
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Event 7
Review of previous activities.
Cells, organelles, pigments, and cancer.
Emergent properties of cells
On-line (and upcoming) activities
Carbon cycling and climate change: Nature matters!
Assignment, Event 7
Quiz
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Quiz
You entered the classroom today wearing a light blue shirt.
If this room is completely dark what color will your shirt be?
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Quiz
My answer:
Color only exists in the presence of light and the shirt—and everything else there—will have no color (i.e., be black). Pigment molecules absorb, reflect, and transmit light of different wavelengths based on their chemical composition. The net result is what our eyes perceive as a color. Without light there is no color!
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Last Event: Cells
Assignment, Event 6:
Emergent properties are those that occur within some system but not in its component parts outside the system.
Cells are constructed from organelles and can exhibit many life processes (e.g., division, energy transformation).
These process do not occur given only the component parts in the absence of cells.
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All assignments submitted to Assignments folder:
Must be Word files (.doc or .docx) or PDF file (.pdf). Any other file types will not be read and will be scored “0.”
Unless otherwise noted, assignments are to be your own work, using your own words.
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UNIT 3 The Cell
UNIT 4 Metabolism
UNIT 5 Cell Division
UNIT 6 Classical Genetics
UNIT 7 Evolution
UNIT 2 Introduction
to Chemistry
UNIT 8 Ecology
UNIT 1 Introduction
On-line activities, Event 7
CHAPTER 4: Metabolism
Module 11: Energy Pathways*
Module 12: Chapter Summary*
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* Module with quiz.
Quiz due dates
Metabolism: the sum of the physical and chemical processes in an organism by which its material substance is produced, maintained, and destroyed, and by which energy is made available.
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414.1 ppm
02/24/20
411.8 ppm
02/12/19
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Glacier National Park, MT
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Photosynthesis
glucose
Fermentation
Ethanol
Respiration
CO2 + H2O
ATP
ADP + P
Work
Movement of
motor proteins
Molecular
transport
Synthesis of
biomolecules
CO2 + H2O
Photosynthesis provides the energy that drives all metabolic processes.
Light +
Chloroplasts +
CO2 +
H2O
C6H12O6
O2
ATP
Module 23, page 142
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plankton
petroleum + gas
terrestrial plants
coal + methane
Photosynthesis
Petroleum and natural gas are formed by the anaerobic decomposition of remains of organisms including phytoplankton and zooplankton that settled to the sea (or lake) bottom in large quantities under anoxic conditions, millions of years ago. Over geological time, this organic matter, mixed with mud, got buried under heavy layers of sediment. The resulting high levels of heat and pressure caused the organic matter to chemically alter, first into a waxy material known as kerogen which is found in oil shales, and then with more heat into liquid and gaseous hydrocarbons in a process known as catagenesis.
Terrestrial plants, on the other hand, tend to form coal and methane. Many of the coal fields date to the Carboniferous period of Earth's history (300-360 MYA) Terrestrial plants also form type III kerogen, a source of natural gas.
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C8H18 + O2 H2O + CO2 + energy
octane, one of the common
hydrocarbons in gasoline
ignition
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34.3 + 4.9 – 11.2 – 8.7 – 2.1 = 17.3
26% increase since 1960 (674 -> 850)
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10 Sep 2020: 410.99 ppm, 1958: 315 ppm, = 30.5% increase
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C6H12O6
O2
CO2
H2O
PHOTOSYNTHESIS
HEAT
LIGHT
chloroplast
glucose
oxygen
mitochondrion
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C6H12O6
O2
CO2
H2O
CELLULAR RESPIRATION
HEAT
ADP + P
ATP
soil microorganisms
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C6H12O6
O2
CO2
H2O
CELLULAR RESPIRATION
HEAT
ADP + P
ATP
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C6H12O6
O2
CO2
H2O
PHOTOSYNTHESIS
LIGHT
CELLULAR RESPIRATION
HEAT
HEAT
ADP + P
ATP
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Forests contain about 250 GT of carbon and when mature may accumulate up to 200 g of carbon per m2 each year.
= Carbon sink
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Forest disturbance releases CO2 and results in less photosynthetic uptake of CO2.
= Carbon source
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If all carbon released by land-use changes (mostly deforestation) could be restored through reforestation this would reduce CO2 in the atmosphere by 40-70 ppm by 2100.
Fossil fuel emissions are forecast to increase CO2 in the atmosphere by 170-600 ppm by 2100.
However, reducing deforestation will result in reductions in atmospheric CO2 due to photosynthetic uptake and reduced respiration associated with disturbance.
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An activity for Event 7:
Use the Global Footprint Network’s Footprint Calculator* to estimate your total (carbon) footprint.
Instructions:
Enter information as a “New User.”
Enter information for an entire 12-month period. This includes the summertime.
Enter detailed information whenever possible.
Think about what you can do to reduce your footprint.
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* http://www.footprintnetwork.org/en/index.php/GFN/page/calculators/
Assignment, Event 7:*
View the TED Talk by Greg Asner entitled, “Ecology from the air.”*
Asner discusses how airborne sensors are being used to map carbon within forests. He notes that to be able to effectively manage carbon within forests, we need to understand exactly how much is there. Write an essay (< 200 words) that explains why this knowledge is important as we work to manage carbon within our atmosphere. Your audience is persons responsible for government policies and regulations related to carbon.
* Link in Content Course Organization Information related to assignments
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Quiz
Photosynthesis is an essential metabolic process that produces chemical energy that supports all life on Earth.
What structure(s), non-biological molecule(s), and form(s) of energy are necessary for photosynthesis to occur?
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chloroplasts; H2O and CO2; light energy
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1880 1900 1920 1940 1960 1980 2000 −.8
−.6
−.4
−.2
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1.0
1.2
Annual Mean 5−year Running Mean
T em
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A no
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C )
Global Temperature (meteorological stations)
1880 1900 1920 1940 1960 1980 2000
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1.0
1.2
Annual Mean
5−year Running Mean
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Global Temperature
(meteorological stations)
