Final answer:
The Primary Pathway suppresses transposons by silencing their transcription with piRNAs, which guide the cleavage and degradation of transposon RNA transcripts by PIWI proteins.
Step-by-step explanation:
The Primary Pathway represses transposons by silencing of transposon transcription by piRNAs. This process involves a complex mechanism where piRNAs bind to PIWI proteins and guide them to transposon RNA transcripts. The PIWI proteins then cleave the transposon RNAs, leading to their degradation and preventing the integration of transposons into new locations within the genome. This RNA interference mechanism is crucial for protecting the integrity of the genome from potential transposon-induced mutations.