Complex sentence: It may be considered to be analogous to the life cycle of the flowering plant, however in algae the oogonia are released and fertilized in the sea while in flowering plants the ovules are fertilixed while attached to the parent plant and then released as a fertilized seed.
Split into simpler sentences: It may be considered to be analogous to the life cycle of the flowering plant. However in algae the oogonia are released and fertilized in the sea while in flowering plants the ovules are fertilixed while attached to the parent plant and then released as a fertilized seed.