Question

A marine biologist dredges up a small animal from the bottom of the ocean. It is uniformly segmented, with short, stiff appendages and soft, flexible skin. It has a complete digestive system and a closed circulatory system, plus multiple true coeloms. Based on this, you determine that the animal must be a(n) _____. See Concept 33.3 (Page 701)

Answer 1

Phylum Annelida

Explanation:

The given animal must be an Annelid.

Annelids are commonly called segmented worms. The characteristics features of annelid are:

• Segmented bodies , each segment is called annuli.
• Closed circulatory system.
• Stiff appendages and flexible skin.
• Eucoelomate i.e the presence of true coelom.
• Nephridia as excretory organs.

Since the animal discovered by the marine biologist has a segmented body and true coelom, it is obviously categorized in Phylum Annelida.