Physical Anthro Chpt 2
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What kind of questions might a person not familiar or a person who doesn't believe in evolution might ask?
- Why dont we see new species
- why do we still have monkeys
what is evolution
- a change in the genetic structure of a population
- also used to refer to appearance of new species
did humans evolve from monkeys of chimps?
when did earliest human ancestors evolve?
- 6-8 mya
- humans seperated from a monkey-like ancestory 20 mya
why are monkeys still around then?
early primate lineage went went off in different directions after they separated from each other
why dont we see new species then?
because with the exception of microorganisms new species take a long time to evolve, which we wont see over the course of our own lifetime. Only microevolutionary changes can be witnessed.
why can evolution be controversial?
- it can go against biblical teachings and offend people who are religious.
- it is often considered a theory, or an idea or hunch
where did the discovery of evolutionary principles take place?
western europe in the 16th century
who was the first person to explain the basic mechanics of the evolutionary process?
What theory did Charles Darwin come up with?
theory of natural selection
what is natural selection?
who along with Darwin came up with another theory of evolution?
fixity of species
- notion that species once created can never change
- opposes biological evolution
- christian inspired belief
what is the "argument from design"
traditional, often religious and fixated belief that God deliberately designed everything that we see as they should be.
when did the development of evolutionary theory come about?
- Europeans came across a major paradigm shift at the start of european exploration.
- things were not as concrete as they had originally considered
what is paradigm shift?
- transition from one conceptual framework or prevailing and widely accepted viewpoint to another.
- ex. the acceptance of the discovery that the sun is the center of our solar system, not the earth.
what is paradigm?
a typical model, idea, or pattern of something
- developed the concept of species
- recognized groups of plants and animals differed from other groups due to their ability to mate and produce
- he placed groups of reproductivly isolated organisms into categories that he called species
- first to use the labels genus and species
- pertains to groups of organisms that mainly becuase of genetic differences are prevented from mating and producing offspringwith members of other groups.
- ex. dogs cannot mate and produce offspring with cats.
Carolus Linnaeus (Carl Von Linne)
- swedish naturalist
- developed method of classifying plans and animals
- standaradized john ray's us of genus and species terminology
- established system of binomial nomenclature.
- added 2 more categories class and order which together came to be the 4 level system basis for taxonomy: genus, species, class, order
- classified humans in the genus homo and species sapiens category
why was it unusual for Carl Von Linne's classification of humans?
humans are suppossed to be top of the food chain unique and separate
branch of science concerned with the rules of classifying organisms on the basis of evolutionary relationships
two names in taxonomy established by Carolus Linnaeus
Georges -Louis Leclerc de Buffon
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