2.2.3 coevolution

Question 1

what is meant by coevolution

Answer 1

the process by which two or more species evolve in response to selection pressures imposed on each other

Question 2

what can act as a selection pressure on a species

Answer 2

a change in the traits of one species

Question 3

when is co evolution frequently seen

Answer 3

in pairs of species that have symbiotic interactions

Question 4

what is symbiosis

Answer 4

co evolved intimate relationships between members of two different species

Question 5

what is mutualism

Answer 5

this is when both organisms in the interaction are interdependent on each other for resources or other services. as both organisms gain from the relationship, the interaction is positive positive

Question 6

what is commensalism

Answer 6

this is when only one of the organisms benefits so it is positive neutral

Question 7

what is parasitism

Answer 7

this is when the parasite benefits in terms of energy or nutrients and the host is harmed as the result of the loss of these resources

Question 8

what does the red queen hypothesis state

Answer 8

in a coevolutionary relationship, change in the traits of one species can act as a selection pressure on the other species

Question 9

what does the red queen hypothesis mean for relationships

Answer 9

they must adapt to avoid extinction