___________________ 43. __?__ is an asexual method of reproduction in sponges.

___________________ 44. Where are cnidarians most likely to be found?

___________________ 45. A(n) __?__ is the only opening possessed by a cnidarians.

___________________ 46. The spiny objects that form the skeleton of a Venus' flower basket sponge are

___________________ 47. The bath sponge is in the phylum _____.

___________________ 48. A(n) __?__ is not present in a sponge.

___________________ 49. The gathering of sense organs and nerve cells in the head region is

___________________ 50. Animals with out tissue, mouth or gut are called

___________________ 51. Aquatic animals that strain floating plants and animals from the water they take in are

___________________ 52. The skeleton of a natural bath sponge consists of fibers of

___________________ 53. Many sponges manufacture tiny __?__ that form the skeleton of the sponge.

___________________ 54. Phylum of pore-bearers who live in water

___________________ 55. What do we call aquatic animals that stain plants and animals from the water around them?

___________________ 56. __?__ is a special kind of cell that builds the spineless.

___________________ 57. Bath sponges consist of a protein fiber called

___________________ 58. In sponges, the cells that move about are _____.

___________________ 59. Some freshwater sponges produce structures called __?__ which can survive winter.

___________________ 60. Which cell contract to regulate the surface area of a sponge.

___________________ 61. Porifera is the phylum to which __?__ (common name) belong.

___________________ 62. The interior of a sponge is lined with flagellated cells called

___________________ 63. Animals that spend their entire adult lives attached to one spot are _

___________________ 64. Current of water is powered by flagella of cells called

___________________ 65. Thin flat cells that make up the outer layer of a sponge and regulate its surface area are called

___________________ 66. Exit for water from the central cavity is called

___________________ 67. Many animals that feed on tiny bits of decaying plants and animals are detritus feeders. T F

___________________ 68. The sponges zygote tuns into a swimming __?__ that can settle or travel before landing.

___________________ 69. Products used to produce antibiotics and to treat leukemia and arthritis are produced by _____.

___________________ 70. What is the name of the structure labeled a in Figure 52?

___________________ 71. What can a sponge do even if its sessile?