Most of the sponges do not release their eggs into the water, until they hatch. After fertilization, the zygote remains attached to the mother body and develops into larva, having cilia within its outer layer of cells. The cilia function in movement of larva and enable the larva to swim.
Thus, the correct answer is option). 'helping the larva swim out of the adult sponge.
1, Her logic is utterly incontrovertible. 2, We have incontrovertible evidence of what took place. 3, These are all incontrovertible facts. 4, CCTV provided incontrovertible evidence that he was at the scene of the crime.
