When imbalances occur in the sex ratio of sexual species that have two sexes (that is, other than a 50:50 ratio), the members of the minority sex often receive a greater proportion of care and resources from parents than do the offspring of the majority sex. This is most clearly an example of ________.

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#Question id: 11169

#Section 2: Evolution

The viceroy butterfly (limenitis archippus) resembles the queen butterfly (danaus gilippus), a species toxic to birds because of alkaloids it stores during larval development from the milkweeds it feeds upon. The viceroy butterfly is an example of what kind of defense against predation?

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#Question id: 11257

#Section 4: Behavioural Ecology

Close examination of the yucca-yucca moth mutualism has shown that what appear to be coevolved traits may have been __________ that were critical to the establishment of the mutualism in the first place.

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#Question id: 12313

#Section 1: Ecology

Modern behavioural concepts relate the cost of a behavior to its benefit. Under which relationship might a behavior be performed?

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#Question id: 4571

#Section 2: Evolution

Evolutionary trees such as this are properly understood by scientists to be

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#Question id: 12111

#Section 1: Ecology

Which of the following is a tertiary consumer?