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Simian Immunodeficiency Virus (SIV) is thought to be a precursor to HIV. This multi-part case study explores changes in SIV in different chimpanzee populations and how researchers use this information to test hypotheses about the origins of HIV.
Kosal, Erica F.
1.5 to 2 hrs.
Correspondence to the Next Generation Science Standards is indicated in parentheses after each relevant concept. See our conceptual framework for details.
- Present-day species evolved from earlier species; the relatedness of organisms is the result of common ancestry.
- Similarities among existing organisms (including morphological, developmental, and molecular similarities) reflect common ancestry and provide evidence for evolution.
- Speciation is the splitting of one ancestral lineage into two or more descendent lineages.
- A hallmark of science is exposing ideas to testing.
- Classification is based on evolutionary relationships.