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SAT II BIOLOGY > Evolution > Flashcards

Flashcards in Evolution Deck (17):
1

Transitional fossils

-link older extinct fossils to modern species

2

industrial melanism

Darkening due to industrialization ex/ Peppered moth

3

Balanced polymorphism

-Caused by disruptive selection
-2 or more phenotypes coexist in a population

4

Sources of variation in a population

Mutation, genetic drift, gene flow

5

Genetic drift

Bottleneck and founder effect

6

Bottleneck effect

-Natural disasters result in loss of genetic variation
-Alleles may be under or overrepresented

7

Founder effect

-Small population breaks away from a larger one to colonize a new area
-Not genetically representative of the original larger population
-Rare alleles may be overrepresented

8

Characteristics of the Hardy-Weinberg ther0y

1. Population must be large
2. Population must be isolated from others
3. No mutations
4. Random mating
5. No natural selection

9

Temporal isolation

time

10

Parallel evolution

-2 related species that have made similar evolutionary adaptions after their divergence

11

Gould and Eldridge

punctuated equilibrium

12

Framcesco REdi

Meat and maggots
Disproved SPontaneous Generation

13

Oparin and Haldane

-Hypothesized that under the conditions of early Earth, organic molecules could form

14

Stanley Miller and Harold Urey

-tested the Oparin-Haldane hypothese
-Proved almost any energy source would have converted inorganic molecules in to organic molecules(amino acids)
-used electricity - lightning and Uv lights

15

Sidney Fox

Able to produce cell-like structres called proteinoid microspheres

16

heterotroph hypothesis

-The first cells on Earth were anaerobic heterotrophic prokaryotes
-They absorbed organic molecules from surroundings

17

Margulis

Theory of endosybiosis