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Flashcards in Species Deck (10):
0

What causes one species to split into two?

Reproductive isolation

Geographic isolation

Temporal isolation

1

What is Speciation?

The formation of a new species

2

When populations become reproductively isolated they can?

Evolve into two separate species

3

When two populations are capable of interbreeding they develop differences in?

Courtship rituals and other behavior

4

What is Geographic Isolation?

When two populations are Separated by geographic barriers

5

What is Temporal Isolation?

When two or more species reproduce at different times


Ex:Orchids pollinating at different times of the day

6

Scientists use what to figure out how closely related various organisms are?

Use DNA

7

Scientists can use a ______ to compare stretches of DNA to track the passage of evolutionary time?

Molecular clock

8

A Molecular Clock uses______in DNA to estimate the time that two species have been evolving independently?

Mutation rates

9

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