Species Flashcards
What is Speciation?
The formation of a new species
What causes one species to split into two?
Reproductive isolation
Geographic isolation
Temporal isolation
When populations become reproductively isolated they can?
Evolve into two separate species
When two populations are capable of interbreeding they develop differences in?
Courtship rituals and other behavior
What is Geographic Isolation?
When two populations are Separated by geographic barriers
What is Temporal Isolation?
When two or more species reproduce at different times
Ex:Orchids pollinating at different times of the day
Scientists use what to figure out how closely related various organisms are?
Use DNA
Scientists can use a ______ to compare stretches of DNA to track the passage of evolutionary time?
Molecular clock
A Molecular Clock uses______in DNA to estimate the time that two species have been evolving independently?
Mutation rates
The more differences that are between the DNA sequence of the two species means?
The more time has elapsed since the two species shared a common ancestor
