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Bio 100 Class Notes- March 22nd

by: Megan Hansel

Bio 100 Class Notes- March 22nd Biol 100

Marketplace > Kansas > Biology > Biol 100 > Bio 100 Class Notes March 22nd
Megan Hansel
GPA 3.78

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weekly notes
Principles of Biology
Laurel Haavik, Richard Williamson
Class Notes
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This 2 page Class Notes was uploaded by Megan Hansel on Sunday March 27, 2016. The Class Notes belongs to Biol 100 at Kansas taught by Laurel Haavik, Richard Williamson in Winter 2016. Since its upload, it has received 24 views. For similar materials see Principles of Biology in Biology at Kansas.


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Date Created: 03/27/16
March 22 nd2016  Speciation= when one species splits and becomes more than one other specie Clicker Question 1: Meadowlark Question: D (all of the above)  Reproductive Isolation: doesn’t allow for genetic exchanges and keeps species separate Clicker Question 2: E (all of the above)  Prezygotic: before the egg and sperm become together to create a zygote o Temporal isolation- mating occurs at different times of the year o Habitat isolation- don’t live in the same place so they cannot mate o Behavioral isolation- how they choose their mate (different courtship rituals) o Mechanical isolation- physically cannot mate o Gametic isolation- Gametes cannot match up biologically  Postzygotic: after zygote is created o Reduced hybrid fertility- cannot reproduce workable offspring (ex: mules)  How large does a geographic barrier have to be? o Depends on the ability of the species to move Clicker question 3: B (glacier) **Look at the Thinking like a Scientist slides (didn’t go over in class but will be on the test) ***  Sympatric speciation: when a new species is created in the same habitat or place as the parent species **ISLANDS ARE GREAT PLACES FOR SPECIATION TO OCCUR**  Phylogeny: a tree or diagram to show the evolution of species or groups of them o Comes from:  Fossil record  Morphological homologies  Molecular homologies Clicker question 4: A Clicker Question 5: A  Hominine is a specie that is more closely related to a human more than a chimpanzee  Lice: o Humans have 3 types of lice that can affect us  Chimps only have one that affects them o Why do humans and chimps have different types of lice?  Co-speciation hypothesis:  When the relationship between two species causes a change in a different species (chimp lice vs human head lice) o Why are there different types of lice for humans?  Different habitats to live in Clicker Question 6: C (6 million or less) Clicker Question 7: (third niche hypothesis question) C (Less than 200,000 years ago)


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