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Yahoo is a Directory, rather that a spidering search engine, and sites that are submitted are reviewed by editors who make a decision whether to include it. The Directory sites are the ones listed as "Web Sites."
Yahoo's secondary results are the ones referred to as "Web Pages" and are supplied by Google. So submitting to Google results in spidering and inclusion in those results. The ranking will depend on how well the site is optimized relative to others found under the same search phrases.