1. Describe the process of obtaining and processing food in a primitive herbivorous gastropod like the limpet.
2. Describe the structure and function of the following:
a) Madreporite
b) Pedicellariae12. Outline the affinities between arthropods and annelids.
3. Describe the mantle cavity organs in the phylum Mollusca and give their functions
4. By means of labeled diagram, illustrate the main morphological features of a fully grown annelid trachophore larva. How do trochophores obtain their food?
5. With the aid of a labeled diagram, describe the structure of the arthropod exoskeleton and give its functions.

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