Answer the following questions:
1. Why are sponge spicules not effective defensive structures against fish predators?
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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?