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 >
Spicules are the defensive structures in sponges which are needle like. Special fringes and pallisades of spicules guard the apertures to prevent the entry of â¦ intruders. Sponges not only have spicules to defend but also have other mechanisms to defend their enemies. some produce unpleasant odour and some produce poisonous substances. These poisonous substances when handled cause irritation of the skin and have strong oxidizing action and some may be fatal.