Coevolution

Question 1

What is co-evolution?

Answer 1

Reciprocal evolution - a change in one species causes a change in another species, and vice versa

Question 2

What is co-adaptation?

Answer 2

Character influence by evolution of character in a second species

Question 3

What is tight co-evolution?

Answer 3

Just 2 species involved

Question 4

What is diffuse co-evolution?

Answer 4

1 species is affected by many

Question 5

Give an example of co-evolution caused by competition

Answer 5

Character displacement in sticklebacks:
When there are 2 species, they are morphologically different, where there is one species they have an intermediate morphology = niche partitioning

Question 6

Give an example of co-evolution caused by predation

Answer 6

Shell thickness in molluscs:
Diffuse co-evolutionary arms race with predators - as predators get stronger mouths, the molluscs develop stronger shells

Question 7

Give an example of co-evolution caused by parasitism

Answer 7

Brood parasitism by cuckoos
Cuckoos mimic the colour and speckling of the host egg and the baby cuckoo is fed after pushing the other eggs out of the nest

Question 8

Give an example of co-evolution caused by mutualism

Answer 8

Acacia Conigera and the ant - the ant protects the plant and the plant feeds the ant

Question 9

What is co-speciation

Answer 9

Speciation in one lineage causes speciation in another