2.2.3 coevolution Flashcards

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1
Q

what is meant by coevolution

A

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

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2
Q

what can act as a selection pressure on a species

A

a change in the traits of one species

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3
Q

when is co evolution frequently seen

A

in pairs of species that have symbiotic interactions

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4
Q

what is symbiosis

A

co evolved intimate relationships between members of two different species

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5
Q

what is mutualism

A

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

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6
Q

what is commensalism

A

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

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7
Q

what is parasitism

A

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

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8
Q

what does the red queen hypothesis state

A

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

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9
Q

what does the red queen hypothesis mean for relationships

A

they must adapt to avoid extinction

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