Chapter 15

Question 1

In a mutualism, an individual that increases its production of offspring by overexploiting its mutualistic partner.

Answer 1

cheater

Question 2

An interaction between two species in which individuals of one species benefit while individuals of the other species do not benefit and are not harmed (a +/0 relationship).

Answer 2

commensalism

Question 3

A mutualism in which one partner provides the other with shelter, a place to live, or favorable habitat.

Answer 3

habitat mutualism

Question 4

A mutually beneficial interaction between individuals of two species (a +/+ relationship).

Answer 4

mutualism

Question 5

An interaction between two species in which one or both species benefit and neither is harmed.

Answer 5

positive interaction

Question 6

A mutualism in which one partner performs an ecological service for the other.

Answer 6

service mutualism

Question 7

A relationship in which two species live in close physiological contact with each other.

Answer 7

symbiosis

Question 8

A mutualism in which one or both of the mutualists receives energy or nutrients from its partner.

Answer 8

trophic mutualism