Download Overproduction

Warm-Up:
Date
2/7-8
Session
#
Activity
Page
#
Hidden Organism
Evolution of life “recap”
Mouse Hunt
17
Genotype Phenotype Review
18
Conflicting Evolution Theories
Darwin’s 4 Principles
19
Can U Survive?
20
Rock Pocket Mouse
21
Study for Earth’s History Test
8.L.4 Understand the evolution of organisms and
landforms based on evidence, theories and
processes that impact the earth over time.
8.L.4.1 Summarize the use of evidence drawn from
geology, fossils, and comparative anatomy to form
the basis for biological classification systems and
the theory of evolution
8.L.4.2 Explain the relationship between genetic
variation and an organism’s ability to adapt to its
environment
TLW explain the principles of evolution by
relating each principle to an element of a
classroom demonstration, completing analysis
questions after viewing a video.
Hidden Organism p.17
• You will have 1 minute to search the room for an
organism that “lives” in the classroom.
• Your are this organism’s predator.
• The organism is shaped like this:
• When you find it/them, TELL NO ONE!
• Return to your seat and describe this activity and
the adaptation of this species on 17 of your
notebook. Describe any other organisms you can
think of with this type of adaptation.
Geologic Time Scale records the evolution of life
Unicellular
organisms
(1 cell)
bacteria
Multicellular organisms
(2 or more cells)
Simple plants
ferns
algae
fish
amphibians
Flowering plants
reptiles
mammals
Evolution of living organisms: process through which species
change over time, due to a change in genetic material that is
passed through generations.
Mouse Hunt
Think and write…what did you notice?
Early conclusions?
Genotype Phenotype review
• Genotype is the alleles, or variations, of a gene that are carried by an
organism. Organisms inherit one copy of each gene from each parent.
• Genotypes are represented using letters for each allele. Capital letters
represent the dominant allele, lower case letters represent the recessive
allele. GG, Gg and gg all represent different genotypes for the same trait.
The capital or lower case g’s represent the different alleles for the gene.
• Phenotype describes how the genotype is expressed in an organism.
Phenotype is how an organism looks (physical traits) based on the
genotype. Different genotypes can produce different phenotypes for a
trait.
Two scientists with competing theories of evolution p19
LAMARK
•French
•Animals acquired
traits during their
lifetime and passed
them on to offspring
•Lamark was wrong!!
•Ex. Giraffes
DARWIN
Two scientists with competing theories of evolution
LAMARK
•French
•Animals acquired
traits during their
lifetime and passed
them on to offspring
•Lamark was wrong!!
•Ex. Giraffes
DARWIN
•British
•Natural Selection:
members of a species
that are best suited to
environment will
survive and reproduce
•4 principles to support
Ex: Galapagos Isles Finch beaks
Darwin’s 4 Principles of Evolution
Overproduction
Darwin’s 4 Principles of Evolution
Overproduction
When plant or animal
reproduces, it makes more
offspring than actually
survive and reproduce
Ex
Overproduction
Variation
Overproduction
Variation
•There are naturally
occurring variations (differences)
in traits due to different
genetic material or due
to mutations
•Variations get passed on
to offspring
Overproduction
Variation
•There are naturally
occurring variations (differences)
in traits due to different
genetic material or due
to mutations
•Variations get passed on
to offspring
Ex
Flow Map
shows order of events
Overproduction
Variation
Adaptation
Darwin’s 4 Principles of Evolution
Overproduction
Variation
Adaptation
• Inherited trait that
gives an organism an
advantage in its
environment over
other members of the
species
Ex
Darwin’s 4 Principles of Evolution
Overproduction
Variation
Adaptation
Selection
•Organisms with
an adaptation will
survive to
reproduce and
pass on the
adaptation
“Survival of the Fittest”
Ex
Can you survive?
Answer the analysis questions for this activity:
– Why did some members of this species not survive?
– What adaptations of different traits help some
members survive while others did not?
– Did all members without an adaptation die
immediately?
– What would happen to this species if the
environment changed?
Rock Pocket Mouse Evolution
• Answer video questions. Make sure to explain
your answers.
Isolation
2 populations of the
same species are
separated
They can’t
reproduce
with each other
Different
mutations
occur in each
population
Speciation
evolution of a
new species
from an old one
due to
environmental
changes.
“SPECIATION IS DUE TO ISOLATION”
Or
“ISOLATION CAUSES SPECIATION”
Kaibab squirrel (left) and Albert’s squirrel
(right).