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Agenda 06/29/2010•Data Analysis Station 2•Human Interaction•Adaptation•Natural Selection•Set-up for Photosynthesis Lab•Theory vs Hypothesis•Science Writing
Data Analysis Station 2 – Natural HabitatType of Organism # This is a..
Gold Fish 4
Birds 5
Algae 30,000
Beetle 1
Elodea 9
Fly 3
Strawberry plant 1
Pink heart flowers 1
Little blue flowers 2
Orange and yellow plant 2
Ants 2
Pine trees 7
Clovers 3
Blueberry 2
White flowers 3.8x10_10
Daisy 28
Con’t Data Analysis1. More or Less Types of Organisms?
– More!
2. Why?– Native vegetation attracts all the
3. So, Invasive Species Lower
First order consumers that attract the …..
Biodiversity
Human Impact• What would happen if humans
started build on the meadow?
• What is the main cause of Human Impact?
Adaptations!• My favorite animal is a Bald
Eagle! • Beak – sharp!• Big wings• White tail/head• Brown body• Big• Talons/sharp claws
Adaptations con’t• I think adaptation means:
• The actual definition is:– Ecology: process of adjustment of an
individual organism to environmental stresses
– Evolution: change that results in a structural, functional, or behavioral trait that promotes survival and reproduction
– Simple terms: organisms better suited to their environment
Natural Selection Review
• Requirements:– Big, diverse
population– Time– More born then live
• Cause: Selection Factors– Lack of food– Disease– Predation
Natural Selection Review
• Process where organisms that are more fit survive in the environment while others do not
• These fit traits may be passed on to the other generation
• Over time these fit traits may become dominate within the population changes the population
Which Theory – p. 341 Lifeworks?
• Look at each theory
• Find the requirements and selection factors for natural selection.
• Which do you think is accepted today?
Evolution - history
• Almost every culture – where/why we came from including science
• Thomas Malthus: humans– Not a nice guy!– Human population increase less
food some humans should be allowed to die for better good of population
• Charles Darwin:– Not agree with Malthus (humans
ability to think/create), but apply to “simpler” animals
– Survival of the Fittest (natural selection)
– Gradual changes over millions of years
– Giraffes
• Jean Baptiste de Lamarck:– Acquired Characteristics– Desire or want of parent is
passed on to offspring and further generations
– Giraffes:• Wanted longer necks so
stretched offspring had same desire with time offspring will have longer necks
Which accepted in science today?
Sources• http://www.google.com/imgres?imgurl=http://classes.dma.ucla.edu/Winter06/161B/
projects/tonyau/ps2/1/images/FoodWeb.JPG&imgrefurl=http://classes.dma.ucla.edu/Winter06/161B/projects/tonyau/ps2/1/index.html&usg=__h-N07K25va71PcZ2IAeeYVSKjnw=&h=442&w=523&sz=73&hl=en&start=4&um=1&itbs=1&tbnid=A81NqhKH_0qiqM:&tbnh=111&tbnw=131&prev=/images%3Fq%3Dfood%2Bweb%26um%3D1%26hl%3Den%26sa%3DN%26rlz%3D1T4GGIT_enUS326US351%26tbs%3Disch:1