Warm-Up: Study for Earth’s History Test Date Session # Activity Page # 2/7-8 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

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 Multicellular organisms organisms (1 cell) (2 or more cells) Simple plants ferns Flowering plants bacteria algae fish amphibians 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 DARWIN French Animals acquired traits during their lifetime and passed them on to offspring Lamark was wrong!! Ex. Giraffes

Two scientists with competing theories of evolution LAMARK DARWIN French Animals acquired traits during their lifetime and passed them on to offspring Lamark was wrong!! Ex. Giraffes 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

occurring variations (differences) in traits due to different 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 Variation Adaptation Inherited trait that gives an organism an advantage in its environment over other members of the species Overproduction Ex

Darwin’s 4 Principles of Evolution Overproduction Selection Organisms with an adaptation will survive to reproduce and pass on the adaptation “Survival of the Fittest” Variation Adaptation 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.

same species are separated 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).