Collar cells of sponges function in moving water through the

Collar cells of sponges function in moving water through the sponge\'s body. Water enters the spinose through the osculum. Sponges feed on attached algae. Anconoid sponges are usually the smallest of all sponges. Sponges can reproduce both sexually and asexually. Asexual reproduction in sponges is by binary fission. Sponges are heavily preyed upon by marine fishes. The planktonic form of cnidarians is called a medusa. True jellyfish belong to the class Scyphozoan of the phylum Cnidaria. Both cnidarians and ctenophores manufacture their own nematocysts for capturing prey. Ctenophores are lined with 10 rows of long tentacles used for locomotion. Cephalization is the evolutionary tendency toward the concentration of sense organs at one end of the body of bilateral animals.

Solution

72) Yes. Collar cells beat their flagella to bring water trough sponge.

73) No. Water enters spongecoel through ostia.

74) No. sponges feed on bacteria and small organic particles suspended in water that enters spongecoel.

75) Yes. Asconoid type are the smallest.

76) Yes. They can reproduce sexually and asexually.

77) No. Asexual reproduction is generally by regeneration of broken parts as individual sponges, budding, fission, reduction bodies and gemmules.

78) Yes.Marine fishes prey upon sponges.

79) Yes. It is planktonic form

80) Yes. Scyphozoa are called true jellyfish.

81) No. Cnidarians have nematocysts. But ctenophores do not have nematocysts. They have sticky tentacles and oral lobes to capture prey.

82) No. They have cilia to help in locomotion.

83) Yes.