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

Food Web example…..1. Producers?

2. 1o Consumers?

3. 2o Consumers?

4. Rat introduced?

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• How become adaptations?

– Natural Selection!

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