Answer the following questions:
1. Why are sponge spicules not effective defensive structures against fish predators?
2. How do you think sponge spicules prevent encroachment by anemones that may compete for sponge living space?
3. List 2 sponge metabolites that have protective characteristics against predators. Then, do a little internet research-what other organisms produce these same metabolites?
4. With regards to growth and distribution, how do chemically defended sponge species differ from undefended sponge species? Why the differences?