Survival of the Fittest
Making Natural Selection Work
1 Fish, 2 Fish, Red Fish, Dead Fish
Structures
Random
100
A inherited trait that makes an organism better suited for its environment.
What is an adaptation?
100
Adaptations for one environment may not be useful in another environment because these are different.
What are selection pressures?
100
The whole bag of sticks in this lab represented this for our "pond".
What is a gene pool?
100
What three structures were evidence of evolution.
What are homologous, analogous, and vestigial structures?
100
A group of the same species in one place.
What is a Population?
200
The driving force behind evolution where individuals who are better suited for their environment survive and pass on their traits.
What is Natural Selection?
200
In order for natural selection to occur, organisms must have more ___________________ than the environment can support
What is offspring?
200
Each individual popsicle stick in this lab represented one of these.
What is an allele?
200
Structure that is different now but evolved from a common ancestor.
What is a homologous structure?
200
Charles Darwin sailed these islands on the HMS Beagle and studied the life there.
What are the Galapagos Islands?
300
Individuals who are better at attracting mates than others will pass their genes on based on this kind of selection.
What is sexual selection?
300
In order for Natural Selection to occur, there must be _________________ in the population.
What is variation?
300
Two popsicle sticks together represented this of the individual?
What is the genotype?
300
Structures that have no function now but used to function in an ancestral species.
What is vestigial structures?
300
New versions of traits can arrive from these in your genes.
What are mutations?
400
Humans pick traits that get passed on in this kind of selection.
What is artificial selection?
400
In order for natural selection to occur, one variation in the population must be....
What is better for the environment?
400
This phenotype had the lowest fitness in this "pond".
What are yellow fish?
400
Analogous structures do not come from a common ancestor but have evolved to look the same because they have the same ________________.
What is need/selection pressure?
400
The Lyrebird's call is an example of and adaptation used in this kind of selection.
What is sexual selection?
500
In natural selection, this chooses which individuals live to pass their genes on to the next generation.
What is the environment?
500
This change in the genetic make up of the population happens over many generations.
What is Evolution?
500
The green fish died in this because the environment had a change in these.
What are selection pressures?
500
The limbs of lizards, birds, and whales are an example of this kind of structure.
What is Homologous structure?
500
This is something accepted as fact because of the massive amounts of evidence supporting it.
What is a theory?
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