Special Sub-Topic: I Mollusca !
|Which of the following groups of animals belong to the phylum Mollusca?|
slug, squid, scallop. Mollusks are a group of soft bodied but very diverse creatures.
|An organ that is characteristic of some mollusks is the?|
radula. Gastropods and Chitons use a radula to 'lick' their food. It is a tongue that contains teeth to scrape off plant or animal material.
|Which of these correctly specifies the 3 distinct body zones of a mollusk?|
foot, visceral mass, mantle. The foot of a mollusk may be modified to become tentacles.
|Mollusk shells are secreted by the?|
mantle. Not all Mollusks have a shell. For example slugs, nudibranchs, octopus.
|The group of Mollusks that are generally considered to be the most intelligent are the?|
Cephalopods. The cephalopods include the squid, octopus, cuttlefish and nautilus.
|Respiration in aquatic mollusks is carried out by?|
gills. Gills are widely used by aquatic animals for respiration.
|Excretion of metabolic wastes in mollusks is carried out by the?|
nephridia. The nephridia are commonly seen in many of the invertebrates.
|The type of larva seen in all mollusks is the?|
trochophore. The trochophore larva is characteristic of both mollusks and annelids.
|Which two of the following groups have a radula?|
Polyplacophora and gastropoda. The radula is a tongue like structure with teeth that can scrape algae off of rocks or eat your plants.
|The snail the clam and the squid all have one large common feature in common. It is the?|
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