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Which of the following results allowed Sarah Pryke, Staffan Andersson and Michael Lawes (2001) to conclude that sexual dimorphism in red-collared widowbirds is the result of sexual selection by females?
Life Insurance
A contract between an insurer and a policyholder that pays a designated beneficiary a sum of money upon the death of the insured person.
Necessary
Something essential or required in a particular situation, often used to describe conditions or actions needed to achieve a specific result.
Social Status
The position or rank of a person or group within the society, often determined by wealth, occupation, education, or family lineage.
Express Ratification
The explicit, formal approval or confirmation of an act or contract by the person who is bound by the act or contract, typically done after the act has been completed.
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