Question 1
From the tree, the mollusks have a bivalve feeding mechanism, which helps them to feed on filtering substances from water. They possess teeth that are rasped and used for removing and extracting algae from the rocks. They can use these holes on their shells for bore into the victim's flesh and retrieve food.
Question 2
B. Describe potential selective advantages of having a hinged or coiled shell.
The relevance of coiled shells works to the best of the mollusk. The shells being coiled works bets in the protection of the soft body of the mollusks against physical harm by other organisms. The shells are tough coated with calcium minerals which make them slightly unbreakable for the predators. The coiled nature of the shells makes it rather easy for the mollusks to hide whenever confronted by their predators.
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The coiled shells ease the feeding mechanism for the mollusks. The coiled shells have porous protrusions on their surrounding which enable them to make holes on their prey and extract flesh from them. The shells also have the benefits of protruding tentacles which they use for the detection of the food and their threats. The coiled shells allow the gastropods to crush their food into small particles before chewing on the same.
The mollusks use the coiled shells which have bits of poison which they can use to pierce into their prey and eventually engulfing them as food. The venom which is discharged in small bits is directed into their prey and can also be used as a weapon against their predators.
The coiled shells enable the mollusks to move freely, especially in water. The buoyancy of the mollusks is improved, especially with the soft body making it easier for the slugs to float on water and get from one area to another. Similarly, the curved shells create air within which the mollusks can drag itself, especially on the walls and leaves.
