Exam 1 Flashcards

0
Q

3 major approaches to evolution

A

Theoretical, experimental, observational.

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1
Q

Evolution

A

Species change over time.

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2
Q

Evolution tells us…

A
What?
When?
Where?
Why?
How?
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3
Q

Charles Darwin

A

“Origin of Species”
Did NOT create theory of evolution
Proposed N.S. & DWM
Alfred Russell Wallace

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4
Q

Enlightenment

A

17-18 centuries
Break in 2000 yrs of western thought
Focus on physical/material world

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5
Q

Naturalism

A

Proposal that natural explanations explain the physical/ mechanical world.

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6
Q

Mechanistic universe

A

Natural laws govern the universe.

Paves way for scientific method.

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7
Q

Science

A

A rigorous and repeatable method for observing and understanding the natural world.

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8
Q

Scientific method

A

Careful observation.
Experimentation.
Uses scientific theory.
Uses hypothesis.

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9
Q

Hypothesis

A

A scientifically testable idea.

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10
Q

Thomas Malthus

A

The Essay on Population.

Human populations are affected by natural phenomena.

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11
Q

Jean Baptiste Lamarck

A

Inheritance of acquired characteristics.

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12
Q

James Hutton & Charles Lyles

A

Uniformitarianism.
Natural phenomena are the result of natural laws over long periods.
Geological time.

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13
Q

William Clift

A

Law of Succession.

Correlation between the organisms living in an area and the (recent) fossil record.

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14
Q

George Cuvier

A

Extinction happens

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15
Q

By Darwin’s time:

A

Fossils exist.
Occur in layers.
Layers correlate to age of Earth.
Extinction happens.

16
Q

Natural selection

A

Correlation of traits and fitness.

17
Q

Fitness

A

Ability to survive and reproduce.

18
Q

Postulates

A

Populations are variable.
Traits are heritable.
There is variation in fitness.
Fitness is not random.

19
Q

Natural selection vs. Evolution

A

Individuals vs. population
Survive/reproduce vs. next generation
Phenotype vs. change in genotypes and allele frequencies.

20
Q

Adaptation

A

A trait that increases fitness.

21
Q

Adaptation program

A

The study of traits and fitness

22
Q

Demonstrating adaptation

A

Everything must be testable.
Determine what the trait is for.
Determine if the trait increases fitness for the specified reason.

23
Q

Approaches to adaptation

A

Experimental.
Observational.
Phylogenetic.

24
Q

Phylogeny

A

Evolutionary relationships of a group of organisms based on patterns of shared derived traits.

25
Q

Explanations for traits

A

Phylogeny
Drift
Consequence of chemistry orphysies
Genetic hitchhikers

26
Q

Trade offs

A

The cost of an adaptation.

27
Q

Sexual selection

A

Correlation between phenotype and reproductive success.

28
Q

Intersexual selection

A

Female chooses mate.

29
Q

Intrasexual selection

A

Males fight.

30
Q

Bateman’s Principle

A

The sex with the largest investment in reproduction becomes the limiting resource.

31
Q

Scientific objections to Darwin

A

Age of Earth.
Origin of new traits.
Heredity.

32
Q

Hardy

A

Demonstrates phenotype ratios are a function of all frequencies.
Allele D and R do not cause Fred’s to change.
Population is the base unit of evo.

33
Q

Fischer

A

Father of statistics.
Continuous traits follow Mendel.
Continuous traits are encoded by more than one locus and many alleles.

34
Q

The Darwinian synthesis

A

The harmonization of Darwinian NS and Mendelian heredity.