**Core Concept**
The Ames test is a widely used method for evaluating the mutagenic potential of chemical compounds. It is based on the principle of detecting point mutations in the DNA of bacteria, specifically Salmonella typhimurium. This test is a key tool in the field of toxicology and environmental science.

**Why the Correct Answer is Right**
The Ames test involves exposing bacterial cultures to a suspected mutagen, followed by a series of biochemical tests to detect the presence of mutations. The test relies on the ability of certain bacterial strains to revert from a non-reverting auxotrophic mutation to a revertant form, which can grow on minimal media. This reversion is indicative of a point mutation in the bacterial DNA. The test is specifically designed to detect mutagenesis in bacteria, making option D the correct answer. The Ames test has been widely used to identify potential carcinogens and mutagens in various substances, including environmental pollutants and pharmaceuticals.

**Why Each Wrong Option is Incorrect**
**Option A:** The Ames test is not primarily used to detect carcinogenesis in rodents, although it can be used to identify potential carcinogens that may also be mutagenic in rodents. The test is specifically designed to detect mutagenesis in bacteria, not directly in rodents.
**Option B:** The Ames test is not used to detect carcinogenesis in primates. While primates are a relevant species for carcinogenicity testing, the Ames test is specifically designed for bacterial mutagenesis, not primate carcinogenesis.
**Option C:** The Ames test is not used to detect teratogenesis in any mammalian species. Teratogenesis refers to the ability of a substance to cause birth defects, which is not directly related to the mutagenesis detected by the Ames test.

**Clinical Pearl / High-Yield Fact**
The Ames test is a valuable tool for identifying potential carcinogens and mutagens, but it has limitations. For example, the test may not detect mutagens that require metabolic activation to be effective. Therefore, it is often used in conjunction with other tests, such as the micronucleus test, to get a more comprehensive understanding of a substance's potential toxicity.

✓ Correct Answer: D. Mutagenesis in bacteria