Class Note for GEOS 212 at UA
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This 2 page Class Notes was uploaded by an elite notetaker on Friday February 6, 2015. The Class Notes belongs to a course at University of Arizona taught by a professor in Fall. Since its upload, it has received 17 views.
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Date Created: 02/06/15
LECTURE 20 OUTLINE Intro to Marine Life amp Food Webs November 4 2008 Basics of life first then focus on a few marine communities can t talk about each of gt2 million species Marine organisms and all life on Earth made of elements from physical environment handout Elements in rocks seawater atmosphere amp marine organisms Atoms assembled into molecules gt cells gt tissues gt organs gt organism Molecules can be solid uid or gas Fluids in most marine organisms have same elements as seawater at somewhat lower salinity So do all mammals as all originated in oceans How many atoms needed For a human need 1027 atoms 7 worth of materials all available from hardware store How are materials acquired Breathing 1022 atoms inhaled from atmosphere 10 22 atoms exhaled from organs Drinking 1025 atomsday Eating 1025 atomsday seals consume 1A of body weight per day Rate of transfer 0 You have now exchanged elements with everyone else in class 0 1 million atoms were also in JC 0 Most oxygen in your body today went through a plant last week 0 98 atoms replaced per year 0 Skeleton regenerates every 3 months 0 Skin replaced every month How are atoms assembled into molecules gt cells gt tissues gt organs gt organism DNA is the blueprint for how organism grows and functions Information acquired from all ancestors back to beginning of life What is source of energy for growth and function Plants C02 H20 gt 02 organic material energy from sun photosynthesis Animals 02 organic material gt C02 H20 energy from breakdown of organic material respiration energy also from the sun Vent communities C02 H20 H2S gt 02 organic material energy from sulfides chemosynthesis energy from Earth s internal heat Have constructed a body following the DNA blueprint can process energy to grow and survive 7 how make it alive THDFHIC LEVEL furyuu 6 You Ruml sinn wlchss mu pounds 5 Tum mun pounds Mukher ng 10300 pounds 3 Small sh 100000 puunds 2 human B Lonnmu pounds Phylnplankmn 1nnmLDo wand
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