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Gastropoda: Exploring the Largest Class of Mollusks

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Gastropoda: Exploring the Largest Class of Mollusks

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Questions and Answers

What is the typical larval stage found in most mollusk groups?

Gastropod larva

Polyplacophora larva

Trochophore larva (correct)

Veliger larva

Which part of the mollusk's anatomy is responsible for creating suction to cling to rocks?

Foot (correct)

Gills

Radula

Mantle

What is the primary function of the radula in mollusks?

Scraping algae (correct)

Filtering food

Regulating body temperature

Secreting the shell

What is the characteristic feature of the shell in Polyplacophora?

A shell consisting of articulating plates Signup and view all the answers

Which group of mollusks has a closed circulatory system?

Cephalopods Signup and view all the answers

What is the typical reproductive strategy of most mollusks?

External fertilization Signup and view all the answers

What is unique about the shell of gastropods?

It is always one piece and may be coiled or uncoiled Signup and view all the answers

What is the result of torsion in gastropod development?

The loss of the right gill and kidney Signup and view all the answers

What is the function of the siphon in subclass Prosobranchia?

To separate incurrent from excurrent flow Signup and view all the answers

What is a characteristic of subclass Opisthobranchia?

Reduced or absent shell in most species Signup and view all the answers

What is the function of the mantle floor in subclass Pulmonata?

To contract and fill the lung with air Signup and view all the answers

What is a unique feature of the mimic octopus?

Its ability to mimic other animals Signup and view all the answers

What is the primary function of ctenidia in bivalves?

To play an important role in BOTH gas exchange and feeding Signup and view all the answers

What is the reproductive strategy of most cephalopod species?

Dioecious, with one arm of the male modified for reproduction Signup and view all the answers

What is the result of detorsion in some gastropod species?

The anus and gill are displaced to the right or the rear Signup and view all the answers

What is a unique feature of the phylogeny of gastropods?

They descended from coiled, torted ancestors Signup and view all the answers