Some marine animals, like jellyfish, have alternate sexual and asexual generations.Given that the asexual generation produces plenty of young and takes less energy, what would be the benefit of also having a sexually-reproducing generation?

MCQs on the field of Marine Biology, from a survey of the origin of oceans and their movements to details of marine food webs, life cycles, and marine zonation. As well as on marine environment and ecology, taxonomy and physiology, and contemporary concerns in the field, including human influences on marine systems.