The Theory
Which organism would be most likely to survive?
A. fastest
B. strongest
C. best adapted
C. best adapted
The father of evolution
Who is Charles Darwin?
A trait that is beneficial for an organisms survival
What is advantageous trait
The vocab word that means change through time. The theory that existing life forms have evolved from earlier forms over long periods of time.
What is evolution?
Any trace or remains of a once-living organsim that has been preserved by natural processes.
What is a fossil?
Name two adaptations for cold weather.
Thick fur, migrating to a warmer climate, hibernating
Explain why a mutation can be harmful or beneficial
Mutations lead to traits. some traits can benefit the organism in that environment and some can make it less likely to live.
Any kind of inherited trait that improves an organism's chances of survival and reproduction in a given environment.
What is an adaptation?
Animals that have certain beneficial traits will survive better over time- survival of the best adapted- nature determines who will "win"
What is natural selection
Few individuals of a species colonize a new island. this is called
What is founders effect?
Differences that exist naturally among members of a population or species are called ____________.
What is variation?
Slang term that describes how organisms that posess the best traits or adaptations for a particular environment are the ones that will successfully pass down their traits to their offspring.
What is "Survival of the Fittest?"
An adaptation that enables a species to blend with its environment
What is camouflage
What are two ways organisms can become isolated?
What is geographic and behavioral?
The differences that exist between members of the same species
What is genetic variation?
The process whereby organisms that have advantages survive and pass their genes onto their offspring.
What is natural selection?
What animals did Charles Darwin observe that helped lead him to his theory of evolution- through natural selection and what did he notice about these animals?
What is finches beaks (or tortoise shells)
These are the islands where Darwin developed his theory
What are the Galapagos islands?
A group of genetically similar organisms that can mate and produce fertile offspring.
What is a species?
The random appearance of a new trait in an organism.
What is a mutation?
The random appearance of a new trait in an organism.
What is a mutation?
This is the first step of natural selection
What is overproduction- organisms will produce more offspring than can survive
Give TWO factors that affect natural selection (there are 4)
competition
overpopulation
genetic variation
environmental change
this term is used when a chance event occurs and drastically reduces the population of organisms
What is bottleneck effect?
A new mating song cause two birds to no longer mate. This is called what
What is behavioral isolation?