=== Glossary of Ecology (6th ed.) by [[Krebs_2009|Krebs (2009)]] ===
=== Glossary of Ecology (6th ed.) by [[Krebs_2009|Krebs (2009)]] ===
* compromises between two desirable but incompatible activities.
* compromises between two desirable but incompatible activities.
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=== Glossary of "Life (9th ed.)" by [[Sadava_Hillis_Heller_Berenbaum_2011|Sadava et al. (2011)]] ===
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* The relationship between the fitness benefits conferred by an adaptation and the fitness costs it imposes. For an adaptation to be favored by natural selection, the benefits must exceed the costs.