Final answer:
Platyhelminthes is not the phylum of acoelomates with the highest number of species. Ctenophores bioluminesce, but not because of the copepods they eat. Sponges are mostly monoecious, not dioecious.
Step-by-step explanation:
29) False. The phylum with the highest number of species among the acoelomates is actually the Nematoda, also known as roundworms. Platyhelminthes, also known as flatworms, do not have as many species as the Nematoda.
30) True. Ctenophores, commonly known as comb jellies, do bioluminesce. However, they do not bioluminesce as a result of eating copepods. Bioluminescence in ctenophores is primarily used for defense, communication, and attracting prey.
31) False. Sponges, which belong to the phylum Porifera, are actually mostly **monoecious**, meaning they have both male and female reproductive organs within the same individual.
Learn more about Phylum classification