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This news brief, from February 2012, describes the discovery of hybrid sharks in Australian waters, debunks some common misconceptions regarding the discovery, and examines the possible evolutionary trajectories of these animals.
UC Museum of Paleontology
This article includes a set of discussion and extension questions for use in class, as well as advanced discussion questions for undergraduates. It also includes hints about related lessons that might be used in conjunction with this one. Get more tips for using Evo in the News articles in your classroom.
Correspondence to the Next Generation Science Standards is indicated in parentheses after each relevant concept. See our conceptual framework for details.
- An individualís fitness (or relative fitness) is the contribution that individual makes to the gene pool of the next generation relative to other individuals in the population.
- Occasionally offspring, known as hybrids, result from matings between distinct species or between distinct parental forms.
- Some hybrids have increased fitness relative to their parents.
- Some hybrids have decreased fitness relative to their parents.