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Exploring the Diversity of Annelida: From Phylum to Family

Exploring The Diversity Of Annelida: From Phylum To Family

Explore the fascinating world of segmented worms in this focused study. Understand their biological classification, anatomy, and ecological role. This educational content is ideal for learners looking to deepen their...

Questions: 22 | Attempts: 10 | Last updated: Oct 31, 2025

Sample Question 1
What are the characteristics of organisms in Phylum Annelida?

Unsegmented acoelomates with an open circulatory system and simple digestive tract.

Bilateral organisms with a coelomate body plan and incomplete digestive tract.

Segmented worms with a complete digestive tract, closed circulation, ventral nerve cord, setae, and trochophore larvae.

Radially symmetric organisms with a decentralized nervous system and no distinct digestive system.

Sample Question 2
What are some characteristics of Class Polychaeta?

Soft-bodied animals with a mantle, shell, and muscular foot.

Spiny-skinned creatures such as sea urchins and sand dollars.

Marine worms with many setae, parapodia, and sensory appendages; often with eversible pharynx and trochophore larvae.

Mollusks such as snails, clams, and octopuses.

Sample Question 3
What are some characteristics of Sister Taxa Scolecida (Class Polychaeta)?

Prostmial appendages absent most burrowers or tube dwellers with a bulbous protrusable pharynx.

Live mainly in open water habitats.

Do not have a pharynx.

Have prostmial appendages.