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Gastropod Torsion and Larval Development

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Gastropod Torsion and Larval Development

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Questions and Answers

What is the primary characteristic feature of gastropods during their larval stage?

Ability to undergo coiling

Process of torsion (correct)

Presence of bilateral symmetry

Development of a complex nervous system

What happens to the position of the anus during the process of torsion in gastropods?

It moves backwards

It remains stationary

It shifts upwards near the mouth (correct)

It rotates 90 degrees to the right

During torsion, how does the mantle cavity change its position?

It remains unchanged throughout development

It moves from anterior to posterior

It rotates to align with the shell coiling

It shifts from a posterior to an anterior position (correct)

What is the duration range for the torsion process in gastropods?

15–30 minutes Signup and view all the answers

What results from the unequal growth of the visceral mass in gastropods during torsion?

Twisting and repositioning of internal organs Signup and view all the answers

What is a potential outcome concerning organ functionality during torsion?

One side may degenerate while the opposite side remains functional Signup and view all the answers

How does torsion differ from shell coiling in gastropods?

Torsion occurs prior to the onset of shell coiling Signup and view all the answers

What structural change occurs to the auricle during torsion in gastropods?

It shifts to a position in front of the ventricle Signup and view all the answers

Gastropod Torsion and Larval Development

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Podcast

Questions and Answers

What is the primary characteristic feature of gastropods during their larval stage?

What happens to the position of the anus during the process of torsion in gastropods?

During torsion, how does the mantle cavity change its position?

What is the duration range for the torsion process in gastropods?

What results from the unequal growth of the visceral mass in gastropods during torsion?

What is a potential outcome concerning organ functionality during torsion?

How does torsion differ from shell coiling in gastropods?

What structural change occurs to the auricle during torsion in gastropods?

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