Unit 3 - Patterns of Evolution

Question 1

Adaptive Radiation

Answer 1

Rapid evolution of a single species into many distinct
but closely related new species

e.g. Galapagos Finches, Cichlids

Question 2

Adaptive Radiation usually occurs with a variety new resources and after…

Answer 2

Bottlenecking
Founder’s effect

Question 3

Divergent Evolution

Answer 3

Large-scale evolution whereby common ancestor evolves into many diff forms

e.g. marsupials share common ancestor

Question 4

Convergent Evolution

Answer 4

Evolution of similar traits in distantly related species (2 diff species placed under similar selective pressures)

e.g.
sugar glider - marsupial
flying squirrel - placental
both have wings

Question 5

Coevolution

Answer 5

One species evolves in response to evolution of another species

Question 6

Evolutions arms race

Answer 6

Co-evolving genes must constantly adapt and counter-adapt

Question 7

Co-evolution is most pronounced in ________ relationships

Answer 7

symbiotic

Question 8

3 examples of coevolution

Answer 8

• Leaf cutter ants + fungi
• Clownfish + anemones
• Flowers + pollinators