Which of these does not contain a structural protein? a. ligamentsb. ovalbuminc. tendonsd. musclese. spider silk

The answer is option B "ovalbuminc." Ovalbuminc does not contain a structural protein. A structural protein are fibrous proteins which help form the protective layering on skin, fur, nails, claws, feathers, etc.. Ovalbuminc are proteins that are found in egg whites which do not consist of a structural protein.

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it's unlikely a majority of a large population would agree on issues

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not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.