3. Describe and draw 1) a polychaete that is a surface-dwelling raptorialfeeder and 2) a tube-dwelling suspension feeder that live in oxygen-deprivedwater. Compare and contrast their feeding structures, setae, parapodia, andstructures used for gas exchange. Why might segmentation be reduced in atube dweller?

Answered: 3. Describe and draw 1) a polychaete…

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

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3. Describe and draw 1) a polychaete that is a surface-dwelling raptorial
feeder and 2) a tube-dwelling suspension feeder that live in oxygen-deprived
water. Compare and contrast their feeding structures, setae, parapodia, and
structures used for gas exchange. Why might segmentation be reduced in a
tube dweller?

Expert Solution

Step 1

Nereis Worm (Polychaete)

Kingdom: Animalia

Phylum: Annelida

Class: Polychaeta

Order: Phyllodocida

Family: Nereididae

Genus: Nereis

The bodies of the worms are long and slim, and they are flattened dorso-ventrally. The head is divided into two parts: an approximately triangular frontal lobe called the prostomium and a ring-like posterior portion called the peristomium. These worms are surface-dwelling raptorial feeders.

Polychaetes are soft-bodied animals. Nereis is mobile in nature. Parapodia, eyes, and sensory organs are typically well-developed in mobile forms. Furthermore, some species have chitinous jaws and an eversible pharynx.