Final answer:
Sea squirts reproduce through asexual budding or sexual formation of gametes. In colonial forms, multiple sea squirts live together and are connected, whereas solitary forms exist independently.
Step-by-step explanation:
Sea squirts reproduce through asexual budding or sexual formation of gametes. In asexual reproduction, polyps of sea squirts bud off from the original organism to form new individuals. In sexual reproduction, male and female colonies release their gametes into the water, resulting in the formation of a larva that can swim on its own.
The difference between solitary and colonial forms of sea squirts lies in their organization. In solitary forms, each individual sea squirt exists independently, while in colonial forms, multiple sea squirts live together and are connected through common structures, such as a common digestive cavity or coenosarc. In colonial forms, asexual budding and sexual reproduction result in the formation of new colonies or free-swimming medusae.