Transcript EVOLUTION IN ACTION

WARM-UP 2/6:
• What are the three experiments to discredit the ideas of
spontaneous generation & the vital force?
• Include the names of the experimenters and what
experiments were conducted.
• What was the composition of the Earth’s early
atmosphere?
• Which scientists wrote a paper in the 1920’s predicting that
the atmosphere could be responsible for organic molecules?
• Which scientist recreated the early atmosphere to synthesize
primordial soup?
EXAM
• Wednesday February 12.
• Study Guide: Due Tuesday February 11.
• Will be stamped on 2/11 & Collected on 2/12
• Intervention/Study Lab
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Directed Test Prep: 45 minutes
In this classroom
Monday: 2:45- 3:30 pm
Tuesday: 6:50 – 7:35 am
5% Extra credit on test
• Up to 75% Test Score
• Must be on time, stay 45 min, complete all assignments
FLIGHTLESS BIRD
A Flightless bird ends up on two different islands. The bird is
medium height, has a medium length weak beak and is
slow moving.
How will the bird adapt on Islands #1 & #2:
Make 2 columns.
How many birds can survive without competing for food?
For Each Bird Describe: Amount of feathers, Beak style,
speed and height.
Hints: Weak Beaks are OK for insects. Strong Beaks are
required for seed pods.
Short beaks are Ok for food on the ground. Long
Beaks are required for food inside bark.
MAKE 2 COLUMNS: 1
FOR EACH ISLAND
ISLAND #1
ISLAND #2
Climate: Hot and Dry
Climate: Cold and Wet
Food Sources:
Food Sources:
a. Plants in seed
pods on ground.
a. Plants in seed
pods in tree bark.
b. Fast moving
insects on ground
b. Slow moving
insects on ground
c. Slow insects
inside tall tree
bark.
c. Slow insects
inside tall tree
bark.
WARM UP 2/7
For your flightless birds from yesterday’s activity.
• Did the birds change to be more similar or more
different?
• What things increased the birds similarities?
• What things increased the birds differences?
15-3 NOTES:
EVOLUTION IN
ACTION
PP. 308-311
EVOLUTION
DEFINED…
Evolution of a population is due
to environment and the
interaction of other species
ARTIFICIAL
SELECTION
humans breed for specific traits causing
differences in species (i.e. dog breeding)
TYPES OF EVOLUTION
Convergent evolution:
•Organisms with very
different ancestors become
more alike due to a common
environment
•compare analogous
structures: same functions
but different development
(EX: fish and whales)
Ex: whale and fish, bird and insect
TYPES OF EVOLUTION
Divergent evolution: populations become
more and more dissimilar to adapt to the
environment
-compare homologous structures: similar
body part but may have different functions
Adaptive Radiation: Population undergoes
divergent evolution until it fills all areas of the
environment
• EX: Rough-skinned newt and garter snake
• Newt evolved to produce neurotoxins then the
snake evolved resistance to this toxin through
genetic mutations.
Birds and
flowers,
Humans and
bacteria are
other examples
COEVOLUTION
• When two
species each
evolve in
response to
each other over
a long period of
time.
• This leads to a
close
relationship
4-SQUARE MODEL
Definition
Example
Picture
Word
Related Words (3)
CLASSWORK
“Types of Evolution Tree Map”
Vocabulary 4-squares
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Convergent evolution
Divergent evolution
Artificial selection
Coevolution
Definition
Picture
Word
Example
Related Words (3)
Types of Evolution
Convergent
Evolution
Divergent
Evolution
Definition
Definition
Example
Example