The hypothesis was that a species from the Pacific Rim may have been the ancestor of 28 distinct species on the Hawaiian Islands. Which of these supports this hypothesis AND could be the result of observational testing?

sexual reproduction produces offspring with novel combinations of genes. species that reproduce sexually must maintain two different types of individuals, males and females, which can limit the ability to colonize new habitats as both sexes must be present.

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

the answer to your question is:

c. complementary base-pairing