Co-evolution Flashcards
What is co-evolution?
The process by which two or more species evolve in response to selection pressures imposed by each other.
What does a change in traits of one species act as?
A selection pressure on the other species.
Where is co-evolution often seen?
In species which that have symbiotic relationship.
What symbiosis?
Co-evolved relationships between members of two different species.
How can the impacts of symbiotic relationships be described?
As positive (+), negative(-) or neutral (0).
What are three types of symbiotic relationships?
Commensalism, parasitism and mutualism.
What is mutualism?
Both organisms in the interaction are interdependent on each other for resources or other services. As both individuals gain from the relationship, the interaction is (+/+)
What is commensalism?
When only one of the organisms benefit (=/-).
What is parasitism?
The parasite benefits in terms of energy or nutrients and the host is harmed as a result of loss of these organisms (+/-).
What does the Red Queen Hypothesis state?
In a co-evolutionary relationship, change in the traits of one species can act as a selection pressure on the other species.
What does the Red Queen Hypothesis require species to do?
Adapt to avoid distinction.
