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82 Cards in this Set
- Front
- Back
John Baptist de Lamark
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studied blacksmith arms and noticed the more you used them the more they grow
said that giraffe ancestors were like donkeys and had to stretch to reach the leaves he was wrong |
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Inheritance of aquired characteristics
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(de Lamark) meaning that whatever has changed in one's lifetime will be passed on to the next generation (wrong)
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Evolution
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genetic change through time
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Charles Darwin
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developed idea of evolution
1859 published "Origin of Species by Means of Natural Selection" |
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"Origin of Species by Means of Natural Selection"
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increasing production through reproduction
great deal of variation through living things struggle for survival |
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Natural Selection
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nature decides who survives and who reproduces to pass on the same genes that allow them to survive
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Hardy-Weinberg equation
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used to see if evolution has occured
p + q = 1 p= frequency of dominant allele q= frequency of recessive allele |
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Genotype frequency formula
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p2 + 2pq + q2= 1
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Genetic drift
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changes that occur in genotypes as a result of chance and is also the bottleneck effect since it acts as a constriction point
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Hardy-Weinberg Equilibrium
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if there is equilibrium then there was no evolution
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Hardy-Weinberg Equilibrium Characteristics
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large population
random mating no genetic drift no mutations no natural selections no migration no natural defection |
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Hardy-Weinberg Evolution is occuring
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if the first generation's equation does not match the secodn generations
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Darwin Evolution
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Organisms have gained potential for reproduction
Variations present among members of the same species Struggle for survival Survival of the fittest results from natural selection |
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Directional Selection
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animals that are in the same majority are selected against the minority to blend...white and black and some day everyone will be mixed
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Stabilizing selection
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when year after year the animals in the majority stay the majority and the animals in the minority stay in the minority (cockroach)
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Disruptive selection
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average traits are eliminated from a population
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Species
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are all organisms that produce viable offsprings
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Speciation
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is the production of a new species
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Speciation occurs..
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isolation
Poly Ploidy |
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Poly Ploidy
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a new species is produced as a result of a miotic/ meiotic mistake (plants)
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Darwin/ Galapagos Islands
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studied finches: found that birds with long beaks will be on tress and mate with those while birds with short beaks will be on ground and mate with those
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Prezygotic isolation
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is a geographical habitat behavior
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Postzygotic Isolation
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animals (exception:mules) cannot pass on their genes because they are sterile
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Behavioral Isolation
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animals with certain features can only survive in one place and can only mate with animals that have the same features. (behaviors keep these animals separate)
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Temporal Isolation
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birds are wired to mate to early in the year and their bodies freeze to death
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Mechanical Isolation
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when body parts don't fit
chihuahau and Great dane |
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Ecological Isolation
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animals are unlikely to mate because they spend time in different ecosystems
seagulls and blue jays |
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Gametic mortality
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how sturdy one's gametes are (vaginal tract is lethal to sperm)
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Geographic isolation
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when birds are blown to the Galapagos islands and could not fly back
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Adaptive Radiation
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animals have certain adaptions to help them find food
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Disruptive selection
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average traits are eliminated from a population
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Species
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are all organisms that produce viable offsprings
|
|
Speciation
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is the production of a new species
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Speciation occurs..
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isolation
Poly Ploidy |
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Poly Ploidy
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a new species is produced as a result of a miotic/ meiotic mistake (plants)
|
|
Darwin/ Galapagos Islands
|
studied finches: found that birds with long beaks will be on tress and mate with those while birds with short beaks will be on ground and mate with those
|
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Prezygotic isolation
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is a geographical habitat behavior
|
|
Postzygotic Isolation
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animals (exception:mules) cannot pass on their genes because they are sterile
|
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Behavioral Isolation
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animals with certain features can only survive in one place and can only mate with animals that have the same features. (behaviors keep these animals separate)
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Temporal Isolation
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birds are wired to mate to early in the year and their bodies freeze to death
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Mechanical Isolation
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when body parts don't fit
chihuahau and Great dane |
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Ecological Isolation
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animals are unlikely to mate because they spend time in different ecosystems
seagulls and blue jays |
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Gametic mortality
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how sturdy one's gametes are (vaginal tract is lethal to sperm)
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Geographic isolation
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when birds are blown to the Galapagos islands and could not fly back
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Adaptive Radiation
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animals have certain adaptions to help them find food
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Adaptive Radiation
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organisms are introduced into a new environment and as a result of their special features they move into habitats that best suite their features
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Ecology
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made up of (from smallest to biggest) organism, population, community, ecosystem
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Adaptive Radiation
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organisms are introduced into a new environment and as a result of their special features they move into habitats that best suite their features
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Ecology
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made up of (from smallest to biggest) organism, population, community, ecosystem
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biotic component
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all living things in an ecosystem
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biotic component
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all living things in an ecosystem
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abiotic component
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non living things in the environment water, air soil
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abiotic component
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non living things in the environment water, air soil
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niche
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what an organism does as a living
organisms occupy a given niche in an ecosystem and are classified in trophic levels |
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niche
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what an organism does as a living
organisms occupy a given niche in an ecosystem and are classified in trophic levels |
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First level
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Producers- green plant, convert sun into energy via photosynthesis
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First level
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Producers- green plant, convert sun into energy via photosynthesis
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Second level
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First order consumers- herbivors eat the producers
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Second level
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First order consumers- herbivors eat the producers
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Third level
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Second order consumers- carnivors
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Third level
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Second order consumers- carnivors
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forth level
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Third order consumers-carnivors who eat the second order consumers
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forth level
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Third order consumers-carnivors who eat the second order consumers
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fifth order
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decomposers- bacteria and fungo that breaks down macro molecules of all levels into their building blocks for recycling through the ecosystem
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Second law of thermodynamics
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the reason why there are not equal levels on the pyramid of numbers
everytime you convert energy from one form to another there is terrible inefficency of conversion and you lose a lot of energy |
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Energy cycle
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There is no energy cycle through the ecosystem because it all flows one way
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steak and starving children
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dont give steak to the hungry bc 100 pounds of wheat will add up to 10 pounds but 100 pounds of wheat to a cow then fed to a human is only 1 pound
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Biological magnification
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a toxin that is not normally broken down in the environment
toxins becme part of the food chain |
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Predation
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organisms eat other organism
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fifth order
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decomposers- bacteria and fungo that breaks down macro molecules of all levels into their building blocks for recycling through the ecosystem
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Second law of thermodynamics
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the reason why there are not equal levels on the pyramid of numbers
everytime you convert energy from one form to another there is terrible inefficency of conversion and you lose a lot of energy |
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Energy cycle
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There is no energy cycle through the ecosystem because it all flows one way
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steak and starving children
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dont give steak to the hungry bc 100 pounds of wheat will add up to 10 pounds but 100 pounds of wheat to a cow then fed to a human is only 1 pound
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Biological magnification
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a toxin that is not normally broken down in the environment
toxins becme part of the food chain |
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Predation
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organisms eat other organism
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Commensalism
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when one organism benefits but the other organism is neither harmed nor helped
bird builds a nest in tree |
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Parasitism
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one organism benefits and the other does not
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Toleration
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both parties are not harmed nor helped
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Competetion
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both animals are harmed bc they are after the same species
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Mutualism
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when both animals benefit
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food chain
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can only be found in simple ecosystems
one producer in a food chain |
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Factors that determine population size
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Birth rate
Death rate immigration emigration |