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Gastropods undergo torsion during their larval development, a process where the visceral mass, shell, and mantle twist 180 degrees relative to the body. This rotation occurs during the veliger stage and results in the anus and mantle cavity moving to a position above the head. Torsion allows for a more compact body plan and facilitates the retraction of the head into the shell for protection. However, it also presents challenges, such as the potential for excretory products to contaminate the gills, which have led to adaptations in their respiratory and excretory systems.
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Gastropods undergo torsion as they develop?
yes.
What is torsion in gastropods?
Torsion
Do gastropods have bilateral symmetry?
Gastropods, a class of mollusks that includes snails and slugs, exhibit bilateral symmetry during their larval stage. However, as they develop, many undergo a process called torsion, which leads to a more asymmetrical adult form. While they retain some aspects of bilateral symmetry, the torsion can result in a significant deviation from perfect bilateral symmetry in their adult forms. Therefore, while they start with bilateral symmetry, their adult forms are often asymmetrical.
The developmental process in which one side of the visceral mass of gastropods grows faster than the other and twists around by as much as 180 is known as?
The developmental process in gastropods where one side of the body grows faster than the other, causing the visceral mass to twist is called torsion. This torsion usually causes the anus and gills to end up above the head in adult gastropods.
Which molluscan class includes members that undergo embryonic torsion?
Gastropoda is the molluscan class that includes members that undergo embryonic torsion. Torsion is a unique process in which the visceral mass of the developing mollusk rotates 180 degrees, bringing the anus above the head. This characteristic is a defining feature of the Gastropoda class.
Why do snails undergo torsion?
Snails undergo torsion as a developmental process that helps align their internal organs and nervous system. During this process, their body twists 180 degrees, positioning the anus above the head. This adaptation allows for a more compact body structure, which is beneficial for their movement and habitat. Additionally, torsion may help snails retract into their shells for protection, ensuring that their sensitive body parts are shielded from predators.
How do gastropods function as decomposers?
How do gastropods function as decomposers?
Are snail worms?
No, snails are gastropods.
How do gastropods circulate?
Gastropods have an open circulatory system. Check related links.
If a slug have no shell are they gastropods or cephalopods?
Slugs are gastropods. All slugs are shell-less.
When do the insects that undergo incomplete metamorphosis develop their wings?
when they r lage enough
How did Hinduism develop from brahmanism?
They undergo various changes to actually make it happen.
