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Unit 1: the Science of Life Ch. 2: Features of Life & the Cell

Unit 1: the Science of Life Ch. 2: Features of Life & the Cell Ch. 30 Populations & Communities (selected sections). WHAT IS BIOLOGY???. What do biologists study???.

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Unit 1: the Science of Life Ch. 2: Features of Life & the Cell

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  1. Unit 1: the Science of Life Ch. 2: Features of Life & the Cell Ch. 30 Populations & Communities (selected sections)

  2. WHAT IS BIOLOGY???

  3. What do biologists study??? http://www.google.com/imgres?imgurl=http://blogs.panda.org/coral_triangle/files/2009/07/_dsc5137.jpg&imgrefurl=http://blogs.panda.org/coral_triangle/2009/07/15/wwf-malaysia-in-kudat-banggi-priority-conservation-area/&usg=__OfUaJjyofRtWfvYf93uULaOQaBE=&h=300&w=450&sz=55&hl=en&start=71&zoom=1&tbnid=YaZI-rTFBfWZbM:&tbnh=162&tbnw=206&prev=/images%3Fq%3Dmarine%2Bbiologist%26um%3D1%26hl%3Den%26sa%3DN%26biw%3D1259%26bih%3D815%26tbs%3Disch:10%2C1834&um=1&itbs=1&iact=hc&vpx=114&vpy=393&dur=1311&hovh=183&hovw=275&tx=150&ty=138&ei=IvB-TIaRJ4KClAel6KjtAw&oei=2e9-TMOBCsH98AaEkO3SAw&esq=6&page=4&ndsp=22&ved=1t:429,r:0,s:71&biw=1259&bih=815 Do they all study the same thing? http://www.google.com/imgres?imgurl=http://armandfrasco.typepad.com/photos/uncategorized/arp2c.jpg&imgrefurl=http://www.moleskinerie.com/2006/06/tom_fricke_anth.html&usg=__y3iVJbR3BR8N5yP8icmuDdS5o-Y=&h=244&w=350&sz=55&hl=en&start=2&zoom=1&um=1&itbs=1&tbnid=Be4yQaEwUETH2M:&tbnh=84&tbnw=120&prev=/images%3Fq%3Danthropologist%26um%3D1%26hl%3Den%26tbs%3Disch:1 http://www.keweenawnow.com/news/audubon_03_02/images/janet_audubon1.jpg

  4. What is an organism? http://www.bigelow.org/bacteria/kingdom_2.jpg

  5. Living vs. Non-living How do we know? http://www.animationlibrary.com/animation/18709/Dolphin_in_frame/ http://www.animationlibrary.com/animation/25626/Fire_burns/

  6. 1. Living things are organized • What is the smallest (basic) unit of life? • What is the largest unit of organization?

  7. 2. Living things respond to stimuli What is a stimulus? Why is responding to stimuli so important? Plants Responding to Light

  8. 3. Living things maintain homeostasis • What is homeostasis? • Examples • body temperature • CO2 level in blood

  9. 4. Living things grow & develop • Both living & non-living things can grow…. • How is it different? • What is the difference between growth & development?

  10. 5. Living things reproduce • What is the “goal” of reproduction? • Biogenesis theory • “Like produces like…” • What does this mean? • Asexual vs. sexual reproduction • Does every member of a species need to reproduce? Why or why not?

  11. 6. Living things have adaptations & evolve • What is an adaptation? • Over time, beneficial adaptations are “selected for” & the population or species __evolve____________… • Individual organisms do not evolve!!! • Evolution explains the diversity of life. • Pepper Moth “Game” http://www.techapps.net/interactives/pepperMoths.swf • Principles of Natural Selection "Interactive"

  12. http://www.sciencenewsforkids.org/articles/20031112/a228_2194.running.jpghttp://www.sciencenewsforkids.org/articles/20031112/a228_2194.running.jpg http://psych.fullerton.edu/mbirnbaum/psych466/CSW/growth-chart.jpg http://www.irishcatholicdoctors.com/documents/images/CouplewithbabyWORD.jpg 7. Living things need energy • What is energy? • Why is (chemical) energy needed?

  13. Where do organisms get energy? • Almost all the energy organisms use comes from the sun!!! • What type of organisms make their own food using the sun? • examples • What process do they use to make food (sugars)?

  14. Where do organisms get energy? • What is the equation for photosynthesis? • Where is the energy is stored?

  15. Where do organisms get energy? • Some organisms can make their own food without sunlight • chemosynthesis • examples

  16. Where do organisms get energy? • What if an organism can’t make it’s own food? How would it get energy? • What do we call organisms that have to eat to get energy? • What do we call consumers that eat: • Plants? • Other animals? • Both plants & animals?

  17. Where do organisms get energy? • In most organisms, what process releases the energy stored in the bonds of food (glucose)? • What materials are needed? • What materials are made?

  18. Where do organisms get energy? • Cellular (aerobic) respiration… • What is the equation? • What other equation does it look like? • What do organisms use the energy for? ATP

  19. Where do organisms get energy?

  20. Energy & Nutrients • Can energy be recycled? • NO!!!! Just transferred & transformed… • Usually released as heat

  21. Energy & Nutrients • Can nutrients be recycled? • Why must nutrients be recycled?

  22. Where do organisms get energy? • What type of organisms recycle nutrients? • Detritivores • Eat dead organisms • Ex. crabs, worms, snails • Decomposers • Break down organic waste (poop) • Ex. fungi & bacteria

  23. Energy Flow: Food Chains Where do almost all communities get their energy? • Does energy only flow through individual organisms? • Community • Food chains ***Arrow always points toward organism taking in the energy & away from the organism “giving up” the energy.***

  24. Energy Flow: Food Chains 5th trophic level 4th trophic level 3d trophic level 2nd trophic level 1st trophic level http://www.cnr.vt.edu/forsite/owlpellet/josh/PICTS/foodchain.jpg

  25. Energy Flow: Food Webs http://usr-lazio.artov.rm.cnr.it/darwin2007/presentazioni/Modulo14_file/slide0242_image272.jpg

  26. A Connecticut Food Web

  27. What occurs as energy is passed to each trophic level? Lost Energy Lost Energy Amount of energy passed on to the next level.

  28. 10% Rule of Ecological Efficiency ~10% energy is passed to next level ~90% lost Mostly as heat EnergyisNOT recycled. Energy Flow: Energy Pyramids

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