Final answer:
Jovian planets interacted with protoplanets in our solar system by influencing their growth through accretion and causing gravitational perturbations that could lead to migration or altered orbits. This interaction played a critical role in the planetary formation and evolution.
Step-by-step explanation:
The interactions between Jovian planets and protoplanets were a significant aspect of the evolutionary history of our solar system. As the protoplanets grew by accretion of planetesimals, they underwent planetary differentiation, with dense materials sinking towards the core, and lighter silicates rising to the surface. Moreover, the influence of Jovian planets' gravity could 'stir up' the orbits of these planetesimals, supplying the inner protoplanets with a varied range of materials. This process was instrumental in the ongoing growth and development of the protoplanets.
Additionally, the migration of planets like Jupiter could have caused gravitational disturbances that dislodged the orbits of close-in rocky planets, leading some to fall into the Sun. Moreover, the creation of Uranus and Neptune likely occurred closer to the Sun than their current orbits, being relocated to greater distances through gravitational interactions with other Jovian planets. This evidence is further supported by computer models and current understanding of the low-density matter in the outer solar system.
Last but not least, the circumstellar disk's interaction with the giant planets probably caused migration, wherein the planets spiraled inward due to friction with the disk's gas and dust. However, how these planets stopped before falling into the star remains unknown. Some theories suggest that hot Jupiters found in many mature planetary systems are evidence that not all migrating planets meet their end in the star.