If you havenât visited Louisville, KY lately, you might not recognize it. The entire downtown is nearing the completion of a $1 billion revitalization. On virtually every corner thereâs something new popping upânew Bourbon distilleries, new Southern-inspired culinary destinations and new places to explore.
What type of symmetry do sponges have? A: Some sponges have radial symmetry, but many species are irregular in shape and have no symmetry at all. Two simpler groups of sponges, known as asconoid an... Full Answer >
1 Sponges are filter feeders, who absorb nutrients as well as oxygen from the water, that enters its body through the pores. 2  Usually, they feed on bacteria and food particles present in the water; but, some species have a symbiotic relation with certain microorganisms. So, sponges are made of these specialized cells, and they do not have any head, trunk, bodily organs, or appendages. 2  They are simple multicellular organisms. 3  Sponges are filter feeders, who absorb nutrients as well as oxygen from the water, that enters its body through the pores.