Diversification

Question 1

anagenesis

Answer 1

species formation without branching of the evolutionary line of descent

-does not contribute to diversification

Question 2

cladogenesis

Answer 2

the formation of a new group of organisms by evolutionary divergence from a common ancestor

Question 3

What separates species allowing for allopatric speciation?

Answer 3

• glaciation
• have happened repeatedly throughout history (5X!)

-ice sheets create a barrier, isolating species on either side of it

• plate tectonics
• The location of the Earth’s continents have changed over time
• rivers
• Land can separate aquatic species, rivers can separate terrestrial animals

Question 4

evolution of guenons

Answer 4

The barriers created during glaciations caused fragmentation of guenon habitat, which lead to the diversity of guenons seen today

Question 5

Where does the ice in glaciers come from?

Answer 5

• Mostly from the ocean, stored on continents in the form of ice
• Increases in ice cover lead to decreases in sea level
• The newly exposed land acted as a physical barrier to many marine organisms

Question 6

Human factors altering evolutionary processes for primates

Answer 6

• deforestation
• fragmentation
• climate change (changes in temp affects rainfall)
• invasive species