Annelida Characteristics Quiz: Defining Traits of Phylum Annelida

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Questions and Answers

Which of the following is a characteristic of Riftia sp., a type of Vestimentiferan?

Has a branchial plume where the tentacles and cilia are located (correct)

Has two coelomic compartments per segment in the opisthosoma

Has setae along the trunk

Lacks a vestimentum and obturaculum

What is the main function of the clitellum in Clitellata organisms, such as Lumbricus sp. and Pheretima sp.?

To enable the organism to burrow through the substrate

To produce a cocoon for the embryos (correct)

To facilitate gas exchange

To secrete mucus for locomotion

Which of the following is a characteristic of the Echiura (Spoon Worms), such as Bonellia sp.?

Lack of segmentation as adults (correct)

Presence of setae along the trunk

Presence of two coelomic compartments per segment in the opisthosoma

Possession of a branchial plume

What is the key difference between the male and female Bonellia sp. (Green Spoonworm)?

Females are larger in size, while males are very small Signup and view all the answers

Which of the following is a characteristic of Oligochaeta, such as Lumbricus sp. and Pheretima sp.?

Presence of a clitellum Signup and view all the answers

How do Riftia sp. (Vestimentiferans) and Frenulata Vestimentum (Innkeeper Worms) differ in their trunk structures?

Riftia sp. has setae along the trunk, while Frenulata Vestimentum does not Signup and view all the answers

What is the primary function of the setae in annelids?

To facilitate locomotion by clinging to the substrate Signup and view all the answers

What is the significance of the term 'metamerism' in the context of annelid anatomy?

It indicates the repetition of respiratory, excretory, and locomotory organs in each segment Signup and view all the answers

What is the primary mode of respiration in annelids?

Through the cuticle Signup and view all the answers

Which of the following is a key feature that distinguishes the subclass Errantia within the class Polychaeta?

The presence of a non-segmented head region Signup and view all the answers

What is the significance of the term 'dioecious' in the context of annelid reproduction?

It means that annelids have separate male and female individuals Signup and view all the answers

What is the primary function of the parapodia in polychaete annelids?

To provide a means of locomotion and attachment Signup and view all the answers

Which characteristic of clamworms is NOT mentioned in the text?

They have gills for respiration Signup and view all the answers

What is the primary function of the prostomium in clamworms?

It contains the majority of the sense organs Signup and view all the answers

Which of the following is a key characteristic of the order Sabellida?

They have radioles used for gas exchange and filter-feeding Signup and view all the answers

What is the primary source of energy for the Siboglinum sp. (Frenulate Worms)?

Chemosynthesis Signup and view all the answers

Which characteristic is shared by both the Order Sabellida and the Order Terbellida?

They live in tubes Signup and view all the answers

What is the primary difference between the Siboglinum sp. (Frenulate Worms) and the Urechis sp. in terms of their reproduction?

Urechis sp. exhibit environmental sex determination, while Siboglinum sp. do not Signup and view all the answers

Study Notes

Annelids: Characteristics and Features

Riftia sp., a type of Vestimentiferan, has a characteristic of lacking a mouth and digestive system.

Clitellata

The main function of the clitellum in Clitellata organisms, such as Lumbricus sp. and Pheretima sp., is for reproduction and mucus secretion.

Echiura (Spoon Worms)

A characteristic of the Echiura, such as Bonellia sp., is that they have a proboscis and a pair of setae on the ventral side of the body.

Bonellia sp. (Green Spoonworm)

The key difference between the male and female Bonellia sp. is that the male is much smaller than the female and has a shorter lifespan.

Oligochaeta

A characteristic of Oligochaeta, such as Lumbricus sp. and Pheretima sp., is that they have setae on their body.

Riftia sp. (Vestimentiferans) vs. Frenulata Vestimentum (Innkeeper Worms)

Riftia sp. and Frenulata Vestimentum differ in their trunk structures, with Riftia sp. having a more complex trunk.

Annelid Anatomy

The primary function of the setae in annelids is for movement and burrowing.
Metamerism refers to the segmented body structure of annelids, with each segment having similar features.
The primary mode of respiration in annelids is through the skin.

Polychaeta

A key feature that distinguishes the subclass Errantia within the class Polychaeta is that they are more mobile and have a more complex body structure.

Annelid Reproduction

The term 'dioecious' in the context of annelid reproduction means that the species has separate sexes, with males and females.

Polychaete Annelids

The primary function of the parapodia in polychaete annelids is for movement and sensing the environment.

Clamworms

Clamworms do not have a characteristic of having a segmented body.

Sabellida

The primary function of the prostomium in clamworms is for sensing the environment.
A key characteristic of the order Sabellida is that they have a feathery branchial crown.

Siboglinum sp. (Frenulate Worms)

The primary source of energy for the Siboglinum sp. is through chemosynthesis, with the help of symbiotic bacteria.

Order Sabellida and Order Terbellida

A characteristic shared by both the Order Sabellida and the Order Terbellida is that they have a segmented body.

Siboglinum sp. vs. Urechis sp.

The primary difference between the Siboglinum sp. and the Urechis sp. in terms of their reproduction is that Siboglinum sp. has a more complex reproductive structure.

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Description

Test your knowledge on the defining characteristics of Phylum Annelida (Segmented Worms) such as veriform tubular bodies, living in wet or moist environments, cuticle permeability, metamerism, and septa structures. Learn about their segmented body structure and unique features.

BIO 116 LAB 3: Phylum Annelida Characteristics Quiz