Download 9-17-07 - najicschoolbus

Block
IN
 Define
 Competition
 Species
 Adaptation
 Predation
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Block
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Through
Modeling Natural
Selection
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OUT
Begin to start
studying for the test
Come Tuesday with
questions that you
have about
CONTENT, NOT
what is on the test
Today
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Modeling Natural Selection
You will get materials
Decide who will be hunter(3), and game
warden(1)
Count dots, fill out worksheet
Hunt dots
Count eaten and reproduce dots
Continue to fill out worksheet
Graph data
Total eaten
Dots left
Number to
add (X2)
New
population
Red
(15)
Green
(15)
Yellow
(15)
Orange
(15)
Purple
(15)
8
12
5
2
10
Post lab DOT activity
Take out the population data you
collected during the activity
 Create graphs based on the new starting
populations (4 graphs)
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Answer the following questions in your
journals
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1. What is the predator/prey relationship in this
example?
2. In your environment, which prey had the
greatest advantage? What happened to their
population? WHY?
3. In your environment, which prey had the
greatest disadvantage? What happened to
their population? WHY?
4. What is an advantage for all the dots?
5. What is a disadvantage for all the dots?
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6. How do you explain natural selection? Is the
“dot activity” a good model for natural
selection?
7. Write a paragraph that describes how one
characteristic of the prey population might
change because of natural selection.
8. Write a second paragraph that explains how
one characteristic of the predator population
might change because of natural selection.
Read Natural Selection
Natural Selection Game
 Take Notes
 What happened?
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Darwin proposes descent
with modification
Charles Darwin
22, naturalist
5 year voyage on “Beagle”
Ideas changed biology forever
1831
Traveled all over the world
Collected speciemans and made
observations of their structures
Notes continued
Questions related to the geographical
distribution of the organisms that he
observed
Organisms living in temperature areas
of South America were more similar to
organisms living in tropical areas of
South America rather than organisms
living in temperate areas of Europe
Each area had types of organisms that
were well suited for the environment
Notes continued
Spent 20 years
Wrote Origin of species
Used “descent with modification”
Alfred Wallace
competition, East Indies
Worked one year to finish book, 1859
Darwins’ book was better, more
evidence